Pretty Little Liars: The way it should have ended.

Prologue.

As Spencer woke up she rubbed her head. Where the hell am I? she wondered. Ahead of her stood a roof to floor length mirror and she gazed at her reflection. Great, she thought. I'm stuck in this hell hole thanks to…

But who was it that had put her there?

A flash back revealed the answer and in her mind she re-saw Mona, Charlotte's killer, saying Deja-Vou bitch! and whacking her. Wait, she thought. So Mona's AD?!

Of course she was. How could Spencer have been so stupid. Mona had been behind it all from the start. There's no way anyone could have truly stolen the game from her. Not to mention she was caught red-handed by Caleb and Ezra with the game in her apartment.

Putting her hand onto her head to ease the pain she looked at her dreadful reflection. Just when the girls had thought AD was done, this was proof that the game was far from over.

But then – suddenly! Shock radiated though spencer as her reflection dropped her arm. Wait, she thought to herself, but I didn't drop my arm! Then the most bizarre thing happened as the reflection in the mirror leant forward.

"Boo!" it said startling the poor woman.

Spencer backed up as far as she could go.

What the hell?! She thought, She looks just like-

"'ello vere!" came an annoying cockney accent from the other side of what Spencer now realised was glass. "Seein' double are we luv?"

"I don't even know what question to ask first," Spencer said her mind caught between fear and confusion. "Who are you?"

"Reeley?" the other girl replied. "'ow 'ard did Mona hit yew? You wan' know 'oo I am? I'm just a girl who met a man when he came in from the rain."

"Cut the crap!" Spencer snapped as anger clearly won out. "Ok? You got me here, you've got me locked up and god only knows why! I thought you were done! I thought it was over!"

"Me luv? Done? Wha' on eaff you tawking bout?" the other said.

Spencer just stared at her. In truth, it was the most bizarre thing she'd ever seen. A twin! A fricken twin! It was the last thing she needed after learning only a year ago that Mary Drake was her mother and not the woman that had raised her, Veronica Hastings.

"Ve name's Alex by va way," the twin said, smiling with an air of haughty confidence. "Alex Drake."

Drake! Spencer thought. Shocked to hear the name.

"Y-y-you're?" she questioned. "Y-y-you can't be?"

Alex laughed heartedly.

"Wow musta hit you prehee friggen 'ard if yew don' even recongnise ya own twin sista!"

"Your-your…" Spencer began, slowly putting the pieces together. "My…sister?"

Alex shrieked into laughter again a cold shiver-invoking laughter that sent chills down Spencer's spine.

"That's enough you two!" came the sound of another person, however this tone Spencer knew very well.

ACT I.

"Mona!" she cried, jumping up from the crouched position she'd been in and racing to the glass window. "So-so what?" she cried desperately. "Alex isn't A.D? It's you!"

"Me?" Mona questioned with a devilish smile on her face.

"Of course it was you," Spencer replied pacing the room as though talking to herself. "It's been you all this time! Killing Bethany! Playing Alison in the dollhouse! None of us got a gas mask!"

If Spencer was hoping to get a reaction from Mona, she was poorly mistaken. The crazy-woman just looked at her, or almost through her, with that devilish smile she almost always seemed to have.

"Alex, you can go," Mona said calmly. "Your needed in section C."

"Righ'," Alex replied, before turning back to Spencer. "Well wonnerful to meet ya sis! Can' wai' for Thanks given!"

With that Alex turned on her perfectly-matching to Spencer heels and walked off.

"I…I can't believe it," Spencer said. "All this time? All this time! And we…we knew it was you! We all worked it out and yet you-you somehow made us all believe your only 'involvement of late' was killing Cece!"

"Spencer, be quiet," Mona snapped.

"Excuse me?!" Spencer snapped back banging her fists on the glass. "I think if anyone has the right to yell right now it's the woman you imprisoned!"

"I said…" Mona began in a softer tone. "Be…quiet."

At that all the lights in the room turned off at once and an ominous feeling welled up inside of Spencer.

"Maybe some time alone in the dark will help," Mona said threateningly.

The sound of heels walking away could be heard, but they stopped suddenly.

"Oh and Spencer?" Mona called out. "I'd stop throwing accusations around if I were you."

"Accusations?" Spencer replied darkly.

"Well let's put it this way," Mona said. "So far you've accused 2 people of being AD, thanks to your over-analytic brain. And so far…both times…you were wrong."

With that a loud bang could be heard and though she was surrounded by darkness Spencer knew exactly what had happened. Mona had slammed a separate door shut ensuring there'd be no escape.

Not only was Spencer trapped, not only would she not be able to make it to Aria's wedding, but she still had no clue as to who AD could be!

"*"

"What do you mean she escaped?!" Alison demanded.

Her fiancé Emily put an arm around her comfortingly, but both were as confused as the other. Mary Drake, Spencer's biological mother had escaped from prison and of all days today! Aria's wedding day!

"And if Mary Drake does try to reach out to you-" Officer Maple began in an accusatory tone.

"Oh this has to be a joke, right?" Alison shot back.

"Oh it's no joke girls," came the very familiar soft tone of Mary Drake.

All three spun their heads in the direction of the new comer. There she was dressed in an all-black get-up comprising of long black t-shirt, black pants and heels to match.

Officer Maple was the first to regain his composure thanks to all his years on the force.

"Mary Drake you are under arrest-" he began.

"And you…officer Maple," Mary replied. "Are starting to annoy me."

With that Mary rounded a well-aimed kick at the officer who fell to the ground. Quick as a flash Mary picked up his gun and pointed it directly at his face.

"One move," she said softly. "One little move and I'll blow your brains out."

Emily and Alison had no idea what to say. Both had gone white as a sheet.

"Ok girls," Mary said quickly. "We need to get going."

"We're not going anywhere with you!" Emily yelled out defiantly.

But Alison was taking this very differently to her fiancé, her breath was shallow and had quickened ten-fold.

"M…Mom?" she stammered.

Emily snapped her head towards Alison at once.

"Mom?" she asked before looking back at Mary. "M-Mrs D?"

"Mom?! Mrs D?!" Mary replied. "You girls have gotten so deluded by the game, you've ended up coming up with idiotic theories like me being Jessica?" she shook her head in disgust. "The only thing my sister and I ever shared were features and good martial arts training."

"But-But your m-my mom," Alison said shaking. "I-I know it!"

"DO NOT CALL ME JESSICA! EVER!" Mary screamed, scaring the others. "I'm Mary! Mary DRAKE. Urgh thank god I'm not a DiLaurentis! Look at how their kids turn out! You're all whiny and weird and Jason…well don't even get me started. The kid could never stay sober long enough to know that Alex is-"

"Wait," Emily jumped in.

"A-Alex?!" Alison asked.

Mary took a deep breath, she had forgotten herself momentarily and needed to put her game face back on.

"Never mind," she said softly, yet no less defiantly. "Now, come with me."

"But what about our daughter?" Emily asked,

"Oh don't worry," Mary replied smiling. "She'll be taken care of."

The girls looked at each other, neither wanting to go, but both knowing they had no choice. And before long all three were in Mary's car on their way to god only knew where.

"*"

As Alex walked into the bridal room she couldn't help but smile. The amount of times she had pulled off being Spencer in the past and…if things went as they should, she would be Spencer from now on. Ever since she'd found out about her twin she'd wanted her life. Charlotte, her other sister, would never have allowed for it preferring to call Spencer as well as the other girls her 'dolls'. But AD was different. AD like Charlotte made promises, but unlike Charlotte, when AD made promises they were kept. Now, with Spencer locked up, it was finally Alex's turn to take over and she was going to enjoy every moment of it.

Hanna hung up her phone and looked at who she thought was Spencer.

"That was the state police," she said. "Still no word on Mary, Ali or Emily."

"Well…?" said Aria coming around from behind the changing area.

"Hashtag Aria's wedding dress," Alex replied as Hanna started to cry.

"Oh Han!" Aria said comfortingly as Alex walked over to Emily and Alison's new child Maya, who Hanna had rescued after finding out about her parents. "It'll be ok. They'll find the others and it'll all be perfect you'll see."

Hugging her friend, Hanna couldn't help but roughly wipe tears away from her eyes.

"Ok what's wrong with this picture?" she said trying to laugh. "Shouldn't it be the other way around? Shouldn't I be comforting the bride?"

As Aria joined in the laughter, Alex looked into the mirror holding Maya in her arms.

"You so beautiful," she whispered softly. "You look just like your daddy! Wait till Emily and Alison find out you were never meant to be there's. Yes!" the baby gurgled and Alex smiled. To her, it was as though Maya knew she was never meant to be with her current parents.

"*"

"Spencer?! Hanna?!" came a loud voice waking Spencer up.

Wanting to hit herself for falling asleep and still not knowing who AD was Spencer did her best to stand considering how dark it was.

"Aria?!" came another voice. "Where are you guys?!"

"In here!" Spencer yelled out, recognising both voices at once. "Ali! Em! I'm in here, but it's dark and hard to see!"

"It's ok Spencer!" Emily yelled back. "We're going to get you out of here."

"You sure about that?" Alison asked. "Where the hell even are we?"

"Would you quit being pessimistic and help me find a light switch or something?" Emily asked, not believing Alison would be so quick to admit defeat.

"Do you guys…?" Spencer asked pausing to consider if she should tell them. "Do you guys know who AD is?"

"Got it!" Emily cried satisfied as she found a knob and gave it a push.

Instantly the sound of the door that slammed earlier could be heard opening and Spencer smiled.

AD may have the upper hand she thought but 2 can only keep a secret if one of them is dead. 3 on the other hand…

"Spencer can you hear us?!" Emily yelled.

"Emily not so loud," Spencer warned. "If the others knew you were here they'd-"

"What the hell?!" came the sound of Mona's voice.

Instantly the lights came back on and in the moments of trying to adjust to the new light, she grabbed Emily and shoved her into the cell next to Spencers.

"Emily!" Spencer called out. "Alison! Do something!"

But Ali did nothing, she just stood there smirking.

"It's about time loser Mona!" she said darkly. "How many loser Mona's does it take to trap a liar?"

"Half as many Snivelin Shark Boom's!" Mona quipped back, playing with the name Ali used to use Vivian Dark bloom.

"What?!" Spencer cried as her worst fear became a reality. "Ali? Mona?"

"Oh give it up Spencer," Alison said. "I mean…you'd think that the brains of the lairs trust would have worked it all out by now. But I guess not."

"A.D?!" Spencer realized. "Alison DiLauretis? But you-you were doing so well!"

"What?" Mona laughed. "You think Ali's AD?! Talk about Brains trust turning to mush."

"Come on Mona," Ali smiled. "Leave the lights on. Like AD says what's better than Hiding in plain sight?!"