Put a hand on her shoulder and bend her over.
From Create Your Own Story
You gently push her shoulder, which she understands perfectly. She bends over against the far side of the shower, giving you a perfect view of her little pink hole. "Go ahead, James. Fuck your twin sister. Please, take me," she moans out softly. You can't believe what she is saying, but you suppose it all makes sense with the ways she has been acting lately. You stroke your dick a couple more times and push the tip against her clit. Monicka moans out loudly with pleasure as you tease her with your cock. You slide it up and down against her entire pussy, then shove in all the way until you hips hit her ass, making a loud thump sound. "Ooohhhhaaahhhhhh!" she shrieks. "Oh my god." You back out, then shove in hard again, then again and again. She moans out louder every time. You pull her back into you by the hips as you push up against her. "Oh my god, I just lost my virginity to my twin sister, and it's amazing." You think to yourself as her ass bounces on your dick, making her yell and moan out in pleasure. "Why wasn't I doing this years ago?" you wonder. Then, as you start to feel you balls tighten up, the door opens up. Monicka backs you up all the way against the back of the shower, with your dick still in her pussy, and you both stand perfectly still, waiting for what is going to happen next.