a Step-sis Asks for a Threesome

In the privacy of his bedroom, 18-year-old Alex is watching a porn video when he hears a soft knock on his open door. He looks up to see his 22-year-old step-sister, Emily, standing in the doorway. She's always been attractive but tonight, with her hair loose and wearing only a short robe, she looks stunning."Can I come in?" she asks timidly. Alex nods, his heart racing with anticipation. Emily hesitantly walks into the room and closes the door behind her. She takes a seat on the edge of his bed, her robe parting slightly to reveal her black lace panties.Alex clears his throat, trying to act cool amidst the heat building up inside him."What's up, Emily?" he asks, trying to keep his voice light and casual.