DISCLAIMER: I own nothing

A/N:So provisionally an ONEshot, but I have an idea, so we'll see if I can run with... until then, let's have some Halloween'y fun!

-=-=-=-=-=-=-=- The Man Behind the Disguise -=-=-=-=-=-=-=-

Penelope sat anxiously waiting on the moment that Derek would step out dressed as in a potential Halloween costume. She was literally bouncing in her seat with excitement with what he was going to come out in next, but nervous at how turned on she might get as a result – after all anything on Derek Morgan was a major turn on. Already she had seen him dressed up as a 50's mobster, Superman and not so hilariously a clown. She still wasn't impressed with that stint. Especially as he knew her affiliation with clowns wasn't a desirable one.

She stood and went over to mirror and gave herself a once over again. Derek and her had been picking costumes for most of their lunch and after he had given her Marilyn Monroe, she had sent him with something that was nowhere near Halloween'y.

Catching the curtain to the fitting area moving just behind her, she spun around and laughed at Derek's unimpressed expression.

"Happy Birthday, Mr President," She spoke teasingly in a tone reminiscent to that of Marilyn Monroe as Derek stood dressed in what should've been the fancy dress shop's best Barrack Obama outfit. When in actual fact he looked like just a supporter.

"Wrong president," Derek teased her, and then looked down, flicking the badge on the collar of the tux. "You realise, the only bit of correlation to this being anything like Obama is this badge? Without it I'm just a dude in a suit."

"Ah, but what a hot one at that," She said as she grabbed her next outfit and headed towards the fitting rooms.

Derek walked over to the mirror and waited on Penelope – both switching roles again. "Can we just not give up on Halloween?"

"No can do," Penelope called back through the velvet curtain as she undid the zip to her dress.

Derek sighed, undoing the buttons to the suit, taking it off the jacket and then turning to pace, "I said it once, I'll say it again – I love the idea of getting a few films and chilling with a honey."

"Oh yeah," Penelope started, "Who would this honey be?"

"You," He replied simply and walked over to curtain, "You better not had doubted it."

Penelope pulled the curtain back and raised her eyebrows at him sexily, "Well, I might have other plans." She said as she pushed past him and went to the mirror. "Well it's been a while since I wore a black wig," She commented as she sat it straight on her head.

"Cle-o-pa-tra," Derek drooled as he stepped up behind her, looking at the outfit of the Egyptian queen as Penelope fitted it perfectly. "It's a name I can pull apart like Pen-nel-lop-pe."

Penelope giggled and turned back to him. "You have too much time on your hands," She told him and went and grabbed his next outfit. She knew her and Derek were closer than ever at that moment, but it wasn't just their friendship that was entirely healed. Her heart throbbed for him once more. The way her heart beat told her that she was very much in love with Derek all over again. "Go on action man," She told him and handed over the outfit and its separate entireties. She didn't give him an opportunity to fight; she just pushed him towards the fitting room and pulled the curtain across for the umpteenth time. She knew they were on borrowed time; they had already gotten a lengthened lunch as it was, but neither was wasting time. Especially with their luck. They had more chance of getting a case to end this lunch early than this lunch ending at the time it should.

Looking up as Derek's hand came around the curtains edge to pull it back and she held her breath. Her lungs constricted as she watched him step out into the light and she couldn't help but allow the heat of pleasure wash over her as he stood as an actual action man in khaki camouflage pants, a tight tank top and strips of bullets crossing over his body.

"Oh, my own life sized army man," Penelope said impressed as she smiled like a Cheshire cat after she gained some composure, "Ever think about coming into work like this, Stud?"

Derek stepped in closer to her, "Ever think about coming into work as a real life sex kitten instead of just playing one?"

"I don't know what you're talking about," She replied jokingly and smirked even harder, "I am always a sex kitten."

"Hmm, I certainly cannot disagree with you there," Derek told her and the backed away. "However good you think it looks, it's not right."

"Shame," Penelope pouted disappointedly at him.

"What's next?" Derek asked as he started to take off the fake artillery of the army outfit. He watched as she smirked and stood in front of him, eyeing him up and down.

"How about-" She paused as she walked slowly away, "-a cowboy, Handsome?" Penelope purred as she went over to the railing that she had already eyed up. "I'll be your cowgirl if you put these on," She said as she turned back to him, a pair of chaps held up in front of her, the biggest tease of a grin on her ruby red lips. "Whatcha say?"

He chuckled and leant in, "Never gonna happen. Not with your dirty mind around."

"Oh, silly man, I've seen you multiple times in chaps," Penelope teased him and then grabbed a pair of glassed from one of the cabinets and took her glasses off and put them on, "Jock and geek? Pretty apt for us two," Getting a head shake she replaced her glasses and looked around thoughtfully and giggled to herself. "Mickey and Minnie Mouse!" She turned back to him with a big Mickey head and matching costume, "Just for fun!"

"I'm telling you now, we are not going to Emily's party like that," He pointed to the massive head under Penelope's arm.

Penelope pouted, put her head to the side and looked at him pleadingly, "Try it on, for me?" She asked innocently and watched his expression shift. "Please?"

"Fine," He gave in, "But I am not going out of this shop in it though," He relented and took the costume from her and went in back into the fitting room, Penelope quickly going into the one next to him to change into the Minnie Mouse one.

No conversation was conveyed as they got ready. They just waited until the moment of unveiling.

The moment they took one look at one another they both burst out laughing at the ridiculousness.

"I like them," Penelope commented, not entirely convincingly, but near enough. She tapped her finger to her chin as she eyed Derek's costume up and down and tried to stifle a laugh. "They're the first two that have made us laugh and match at the same time."

"That might be true," Derek agreed, "but I could see you as more of a Greek goddess."

Penelope smiled brightly, "Mmm you could be my Greek body guard," She licked her lips and raised her eye brows at him encouragingly, "Or a gladiator." She then watched his expression, how she held his attention so well, "Armour melded to your body, and those little shorts, think they're called subligaculums - They'd show off your thigh muscles so well, Handsome."

"You've been thinking about this haven't you?" Derek asked rather impressed. However, he still had Penelope dressed (or undressed – either way it still had the same effect) as a true Goddess in his mind.

"I do my research well," She told him seriously, her smirk unmoved.

Derek chuckled and pulled her closed to him, "Are we actually gonna find a decent joint outfit idea?" Derek asked as he looked down at the costume, his body already overheating at the mere weight of it. "I can't get my groove on, and win my girl if I'm boiling now can I?"

"Well I do call you Hot Stuff for a reason..." She told him and he laughed at her. "But we do look stupid," She gave in as her body temperature sky rocketed.

The shrill of Derek's phone rang out from his jean pocket as they sat on the chair in his changing room. Disappointedly, Derek went and grabbed it. He was actually going to kiss her. Finally ignite what was waiting to burn forever in them, but the moment just died.

"Yeah JJ?" Derek answered quickly placing the phone on speaker for Penelope to hear and he walked back over to her, "What's up?"

"Guys, we caught a case," JJ told them regrettably down the phone. "This one's pretty bad. Seems to have a thing with Mickey Mouse costumes."

"Okay," Derek said and frowned, "We'll be back as soon as." He snapped the phone and saw the disappointed look on Penelope's face as their lunchtime fun came to abrupt end.

"Well that's that idea out of the window," Penelope grumbled as she headed back to her side of the fitting room to take off the Minnie Mouse costume. She knew they would have next to no time to find a costume and close a case this close to Halloween.

Now she was going to have to wear last year's costume again.

-=-=-=-=-=-=-=- The Man Behind the Disguise -=-=-=-=-=-=-=-