Klaus, Hayley, and Keelin run their little science experiment to test Hayley's, Hope's, and Marcel's blood.

~You Can't Fight Destiny~

Thanks to Hayley's impulsiveness, they had to wait until the next day to get started. After all, Antoinette already had Klaus's blood in her system. Nobody was really sure if that would keep a werewolf bite from even affecting a vampire at all. And, while it could have been an interesting thing to add to their experiment, they had enough to deal with. And that was one experiment that Klaus didn't need any help with. All he needed was either for someone to piss him off enough to make him particularly sadistic, but not enough for him to just rip their head off. Or for someone to volunteer to be his guinea pig. Though that would have to be someone that trusted him enough to be sure that if it didn't work, he would give them his blood once the experiment was over.

But, that was a future concern. And only a concern at all if Klaus decided to make it a concern. She actually doubted that he cared enough to bother. Her concern right now was their current experiment. And that was one that did have a genuine purpose. Especially now. If there was a war between vampires and werewolves getting ready to start, it didn't hurt to know if Klaus was the only one that could help any vampires that didn't side with Greta who might end up caught in the crossfire.

But, just because she was sure that this needed to be done didn't mean that she was really sure that Keelin should be a part of it.

And, apparently she wasn't the only one. Klaus started the proceedings with a question Hayley never expected him to ask. "Keelin, are you absolutely sure you want to be a part of this?"

"Look, if we're going to do this, then we need to do it right. We need to test this. We need to test their blood. And I'd rather test it properly. Besides, this is my family, too. I may be a doctor, but I'm also a Mikaelson. Or at least I hope to be someday, when my girlfriend is ready to take some time to let herself be happy, too."

Hayley smiled at that. "You ever tell her that?"

"No. I get it. Her family has to come first. I don't blame her. I'll be there when she's ready."

Hayley just nodded, but inside she was thinking that maybe somebody should tell Freya exactly how Keelin really felt about her. It was past time that Freya let herself be happy, too.

But, that was something to deal with later. After they dealt with this latest crisis. "Okay. Let's do this."

Keelin nodded and walked up to Antoinette. "I would say that I'm sorry, but I'm really not. Even if you hadn't mentioned wanting to exterminate werewolves and witches too, you still went after my family. You still were plotting the deaths of my best friend and her twelve year old daughter. So, sorry, but not sorry. You deserve this." And then she grabbed Antoinette's arm and bit her.

And they all went back upstairs. "Okay, so what next?"

"We let her sit there for a while. Give the venom time to properly circulate a bit. It would take days for her to die, so we can let it wait. In a few hours or so, Hayley will go down and feed her some of her blood. If that doesn't do anything, then I will give her some of mine. Either way, we then wait another day to get our blood out of her system, and then you bite her again so we can test Hope's blood. And then you go home to Freya."

"Maybe I should just stick around."

"No. That wasn't the plan. Keelin, you may be family, but you are still a doctor. I don't want you involved any more than absolutely necessary. I appreciate your devotion, whether that is to the family, to science, or both. But, I won't ask you to stay longer than necessary to do your part. And I will compel you to go home if I have to. We are going to kill that woman when we're done. You have taken an oath to do no harm. We can fudge on your part in these experiments by saying that the point is to heal her and not let you do any permanent damage to her. You shouldn't be here for the execution."

Hayley rolled her eyes. When had Klaus become so eloquent, anyway. "He's right. Do what we need you to do, and then get out of here."

"Fine! Mainly because I know that there's really no point in arguing with Klaus. I mean, he just flat-out threatened to compel me."

Klaus smiled. "Good. Now then, what shall we do while we're waiting for your venom to filter through her system enough for a proper test?"

Which turned out to be board games. Because why not? For hours, they played Clue, and Scrabble, and then switched to Monopoly. After about three hours they went downstairs to find Antoinette definitely the worse for wear from Keelin's bite.

Hayley bit her own wrist and forced her blood down the bitch's throat. Not that it seemed to do much.

When Antoinette was no better an hour later, Klaus sighed and fed her some of his own blood. "Well, Little Wolf. It seems that you are not able to pass your immunity to werewolf venom on to someone else. Good to know. Now, let's all get some sleep. Tomorrow we'll test Hope's blood. And then send Keelin home."

The next day, Marcel and Davina came back. "You'll be happy to know that Elijah has not unwittingly joined the dark side."

"And, until this is over, there will be no vampires in Manosque except Elijah and Josh, unless Hayley decides to go visit Elijah, again."

Hayley laughed. "I don't think I'm going to be doing that any time soon, as much as I would like to. It might be weird for me to go out there right now. I don't want to make him wonder what's going on."

"No, the last thing we need is Elijah thinking that you're stalking him, now. Much as you may hate it, you need to stay away for a little while longer." Which made perfect sense, so why was Klaus giving her such a speculative look?

"So, where are we on our little experiment?"

"So far, we have determined that my blood does nothing for Keelin's venom. We were just getting ready to start testing Hope's blood."

"You know, it means adding more time to this, but maybe we should test my blood, while we're at it."

Klaus nodded. "That's not a bad idea, while we're here. Keelin, that means a third test from you. Are you okay with that?"

"Yeah. If we're going to do this, we might as well do it right."

They all went downstairs together. Klaus clapped his hands together. "Wakey, wakey! Time for the next round of tests. By the way, we'll be adding three more rounds to this. After all, Marcel is something of an Original hybrid, now. We should see if his blood does anything. I would apologize, but seeing as you're on a mission to murder most of my family, I really am not sorry. Hayley and I are trying to raise Hope to be honest, and I need to set an example, you know. Granted, she's not here, but I don't want to get into bad habits that might slip when she's around. So, honesty above all else. And, I'm really not sorry."

Hayley rolled her eyes. "Honestly, Klaus? Must you always be so melodramatic?"

Marcel laughed. "That's Klaus for you. Ever the showman. Anyway, time for the next test. Go ahead, Keelin." Once Keelin bit Antoinette, he looked up. "So, how long do we wait?"

"We give it a couple hours to circulate, and then we'll give her some of your blood. Give that a few hours, and if it doesn't work, we'll give her some of my blood."

Marcel nodded and they headed back upstairs. "So, what do we do while we wait?"

"We've been playing board games. It passes the time."

Davina giggled. "I'm having a hard time imagining Klaus playing board games."

Hayley laughed. "We started out with Clue. Then Scrabble when we got bored. But, we had to give up on that one because our resident thousand year old pain in the ass kept coming up with weird, archaic words that neither Keelin or I had ever heard of, before. So, we switched to Monopoly. But, if you two have any other ideas on how to pass the time for the rest of the week or so it's going to take us to do this, I'm all ears."

Davina sighed and pulled out her phone. A minute later, she had Kol on Facetime. "I need a deck of cards, and the poker chips."

"It'll take a while for them to get there. Wouldn't it be simpler for you to go to a store and buy some?"

Davina rolled her eyes. "Get them out, put them on the table, then hold the phone up so I can see them." She turned to the others. "You'd think he didn't live with a witch. You'd think he didn't use to be a witch."

Hayley giggled at that. "Well, in his defense, they didn't exactly have smartphones back in the days when he was a witch."

"Still, it's an extremely simple conjuring spell. I'm just asking him to help make it a bit easier." And then she put the phone down, stood up, and started chanting.

And then there was a deck of cards and a poker chip organizer on the table in front of them. "There! That should give us something else to do. Great thing about cards is that when we get bored with one game, we just switch to another one."

"I see why my brother likes you. Ever the resourceful little witch, aren't you?"

So, they divided up the chips and played Texas Hold 'em. Nobody was really surprised when Klaus ended up the big winner. And then Marcel went downstairs to feed Antoinette some of his blood.

An hour later, they all went down to check on her. "Damn. I had hopes. Though, I guess I shouldn't really be surprised. I mean, it's not like that serum was created to be helpful to anyone but Lucian. Damn sociopath was hardly the type to care about helping anyone else."

"Yes, well. I am actually sorry, Marcel." Klaus sighed and bit his own wrist, then fed Antoinette his blood. "Right then. Tomorrow we'll test Hope's blood, and then Keelin can go home to Freya, while we finish up, here."

It was the next day that they got their first pleasant surprise. Hope's blood did what neither Hayley's or Marcel's did. Klaus held up the arm that Keelin had bitten. "Well, would you look at that. We should call Caroline, let her know about this. It could be useful, considering that school she runs."

Hayley nodded. "I'll tell her. At least we got some good news out of this."

"Right then. Keelin, I'll drive you to the airport, compel you onto the next plane back to New Orleans. Davina, are you staying, or are you ready to go home, too?"

"I'm staying. You could end up needing a witch for something, still, and I'd rather be here, than have to take the time to travel, again. Besides, this is hardly going to be the end of it, right? When we're done here, we should probably all go to Mystic Falls. Make sure the school is safe before Hope goes back. Klaus and Marcel can compel other vampires without my help, but I don't fully trust anybody but me or Freya to make Mystic Falls a safe zone after that. Makes more sense for me to do it before Hope gets there, than you guys waiting to have Freya do it."

Klaus smiled. "Kol did good. You, little witch, make a very good Mikaelson."

Hayley put her hand to her mouth to hide a smile at the way Davina's eyes lit up at the praise. Though, she understood it. It was something that they both had in common. Neither of them had truly belonged anywhere until meeting the Mikaelsons. They were family in a way that nobody else had ever really been. Knowing they felt the same way certainly felt good.

Klaus drove Keelin to the airport, then. And the next day they started testing against Hayley's venom.

It took them over a week, running an experiment a day, giving time in between for the blood Antoinette was given to heal her to get out of her system. But, eventually, they knew where they all stood.

Hayley's blood did nothing. Not even against her own venom. Marcel's blood was also a dead end, which he continued to be disappointed about. On the other hand, Hope could cure everything, even Klaus's bite.

But, there was still the execution to deal with. And for that, Marcel stepped in. Judging by the look on Klaus's face when Marcel bit Antoinette, he wasn't expecting that.

"Hope is my sister. And she's just a kid. You know how I feel about hurting kids."

"I had planned on ripping her heart out. But, considering the plans she had for our family, I think I like your way better. Davina, love, do be a dear and soundproof the basement for us? I don't know how long it will take this bitch to die, and I don't want to listen to her in the meantime."

Davina nodded and then put her hands up and started chanting. A few minutes later she smiled. "All right. Let's go upstairs where we don't have to listen to her."