"Oh my god..." Sara moans as Tegan enters three fingers inside of her. The two of them were sprawled out in her and Aiden's bed. The bed sheets rub sensually against Sara's back as her body is thrusted upwards towards the headboard with each upward stroke, and she moans again, louder.

"Told you." Tegan replies smugly. She is straddling Sara's thigh with one hand planted on the bed next to Sara's chest, the muscles in her arm tense from holding herself up. She curls her fingers up to hit Sara's g-spot.

Over the last week, since they went dress shopping, the two of them have been coming back to Sara's apartment daily to have sex during Tegan's lunch break. At first Sara protested, Aiden didn't deserve to be betrayed like this and she didn't think she could handle the guilt that would wash over her as Tegan pulled her into the bedroom. But as soon Tegan's body was on top of hers, she all but forgot who Aiden even was.

Just as Sara is about to hit her climax, she hears the front door being unlocked and opened. Tegan stops her movements and whips her head towards the door, listening intently.

"This can't end well." She mutters, pulling her fingers out.

Panicking, Sara shoves Tegan off of her and scrambles out of the bed, trying to find her clothes and throwing Tegan's at her in the process.

"Fucking hide or something! Get in the closet!" Sara hisses sharply, hopping around and struggling to get her shorts on. Her mind is racing. How could she have been so stupid and careless? Why was Aiden even home, and did he hear anything? Would he leave her and kick her out?

"Been there, done that." Tegan retorts, buckling her belt. Sara can't help but laugh and kiss her sloppily before quickly shoving her into the closet, pressing a finger to Tegan's lips, shushing her.

Sara flattens her hair and clothes down, trying to get her breathing back to normal. She opens the door a crack, slipping out and quietly shutting it. Aiden walks up to her, pulling her into a hug. He lets go and she moves to block the door handle.

"Hey, what're you doing home?" Sara asks nervously.

"I wanted to bring you lunch," he says "but it appears as if someone's already done that." He looks deep into Sara's eyes, dripping with guilt and fear. He couldn't hear voices, but he could hear the stumbling around of more than one person behind the door when he came home. "So what's his name?" He asks casually.

"What? What are you talking about?" Sara tries to act innocent.

"Drop it, Sara. I know you've got someone in there." He sighs, pushing her out of the way.

"There's no one in there Aiden." She says, blowing it off and trying to appear shocked that Aiden would even think she would bring another person into their house, their bed. "Let's go eat." She tugs on his arm towards the kitchen. Aiden shakes her off, opening the door and stepping in, looking around.

Sara's knees are weak and she's getting lightheaded. There was no way this was happening. She knew this is ten times worse than him catching her in bed with five guys.

He crosses his arms, checking for anyone under the bed, behind the dressers, and in the bathroom. Unless the person climbed out the window and scaled the wall, running off, Aiden knows the only other place to look is the closet. He swings the door open and comes face to face with a flushed Tegan.

"You've got to be fucking kidding me." He mutters, grabbing Tegan's arm and pulling her out. He turns to Sara, still gripping Tegan's arm tightly. "My sister? Of all the people you could have cheated on me with you chose Tegan? And in our bed? Why?"

"Aiden, I.. I'm sorry." Sara says lamely.

"Sorry for cheating, or sorry you got caught?"

"...both?" Sara answers, unsure. She's sorry she hurt Aiden, but if she could go back in time, she's sure she'd still want everything that happened with Tegan to happen again, only not be so foolish about it.

"That's nice Sara, real fucking nice. And what do you have to say for yourself?" He turns to Tegan. She yanks herself from his grip and walks over to Sara, taking her hands in her own.

"I know you love me, Sara. I know you don't remember me telling you but I was wrong about wanting you to marry Aiden and forgetting about me. I don't want us to forget. Leave him and be with me, I can make you happy." She pleads, lifting Sara's hands and kissing the top of her knuckles. "I love you. You don't have to be with him just because you think that's the right thing. I'm the one you should be with." She moves the damp bangs from Sara's face and behind her ear.

Sara can't help but blush. She didn't think Tegan loved her. She had lied in Seattle when she was telling Tegan about what she remembered when they were drunk. She remembered telling Tegan she loved her, but when Tegan didn't say it back and freaked out, telling Sara she should be with Aiden, she believed her. Now it appears that she only did it because she thought she was protecting Sara. And a part of Sara couldn't help but agree, the moral thing to do in the situation was to be with Aiden.

"No. No. Get out." Aiden fumes, dragging Tegan out of the room. "Don't come back and don't even think about trying to see or talk to her."

"Sara, please! He's not the one you want!" She yells, then stares daggers at Aiden. "You can hold her up here all you want, but she'll be back for me. She loves me, not you."

Aiden snorts, pushing her out the door and slamming it shut in her face. He goes back to the room to find Sara on the floor, hugging her knees, and bawling.

He crouches down, pushing up on her shoulder until she looks up at him. Her face is stained with tear lines, her nose is running, and her eyes are bloodshot. His own eyes begin to water and she cries harder.

"I'm so sorry. I didn't mean for anything to happen." She sobs. "I should be with you. It's the right thing to do."

Aiden nods slowly, breaking eye contact.

"I have to get back to work. We'll talk about this mess when I get back. If Tegan calls or comes back, I don't want you talking to her, okay?"

"Okay." Sara agrees solemnly.

Aiden leaves and she crawls onto the bed, crying until he gets back, wondering how things will ever be okay again.

Aiden comes home, dropping his briefcase on the couch. As expected, he had a horrible rest of the day at work. He doesn't want things to end Sara, he loves her so much, but he doesn't know how they'll work things out.

He walks into the bedroom and sits on his side of the bed. Sara turns to face him, watching his back as he speaks.

"When did it start?" He asks, his voice flat, void of any emotion.

"About two weeks after we got here."

"Two weeks? Jesus Christ, Sara. It took you two weeks to sleep with her but six months to give it up to me?" He snaps. Sara flinches at his comment, she wasn't just a piece of meat for him to play with. Maybe Tegan was right and he is perverted just like her, he just hides it well. "How many times? Or is there too many to count?"

Sara sighs, "I don't know. Maybe twelve times," she answers honestly.

Aiden tightens his fist around the bed sheets, the veins in his arms sticking out from the tension.

"Did you even go to any tattoo expo in Seattle or was that just one big fuck fest for you two?"

Sara can feel her own anger start to boil. She wants to yell at Aiden, to blame him for this horrible mess. That if he wouldn't have done this, or that, none of this would have ever happened. But she can't. Aiden did nothing wrong, he was the perfect partner, loving, taking care of Sara, and giving her whatever she wanted. Sara was the only one at fault here. Not even Tegan could be blamed, for Sara made the first move on her.

"Aiden, please stop." Sara begs, placing a gentle palm on his back. "I'm sorry this happened. I was vulnerable in this new place with no friends, and you just kept pushing me to be friends with her. It just happened and before I could comprehend what was going on, it had already spiraled out of control. Please don't leave me."

"How am I just supposed to forget? She's my sister, a woman, Sara. Are you a lesbian and i'm just your cover up?"

"No! I'm not a ..." Sara trails off. Truthfully, she didn't know what she was. She didn't think she was gay, but it didn't matter if Aiden would stay. "I promise I won't talk or see Tegan anymore."

Aiden bangs his fists down onto the bed, grunting in frustration, hoping he won't regret his decision. He turns around towards Sara, resting his hand on her knee.

"You are so fucking lucky I love you so much, and you'll have to regain my trust. Things won't be easy for a while, and if I find out you so much as read one text from Tegan, you're gone, okay?"

Sara nods frantically, promising she won't do wrong again, and a small grateful smile tugging at her lips.

Aiden hands her her pillow and a blanket from the closet. He starts ripping the sheets off the bed and tossing them towards the trash. There's no way he could sleep on the sheets marked by Tegan and Sara's lascivious stands at the end of bed, watching with more tears stinging her eyes.

"You can sleep in the other room until I decide otherwise," he says, tossing her pajamas to her feet, "and tomorrow you can go out and buy new sheets."

Sara picks up her clothes, hugging them to her chest, and walks with slumped shoulders to the door. She stops, turning around, tapping a finger against the doorframe.

"Thank you."