Smothered By Your Step-Sister

You estranged step-sister invites you to her remote home under the guise of setting you up with her best friend. But when you arrive, the best friend is nowhere to be seen and your step-sister starts rambling about memories of when you used to playfight together. How she was always so much stronger and could pin you down for hours. You've heard enough and decide it's time to leave, but she won't let you go. You tussle and she ends up getting the upper hand, pinning you beneath her and gloating about always overpowering you. Her breasts are even bigger than you remembered and she knows how much they turn you on. It turns her on too, squishing you between them like you're nothing. She makes you a deal. Fight your way out of this, and she'll let you go. If you can't, you're here to stay. As her and her bestfriend's personal sex slave...