Your twin sister's been really upset that you, a nerd in her highschool, has decided to date her best friend. Now every day someone points out how much you two look alike and how he's got a ticket to the cool crowd because she's your sister. Tired of the humiliation, she confronts you in her bedroom while you're looking for a charger and she's vaping. It almost sounds like she's jealous the way she's going off at you and somehow the conversation goes to her wanting to know if her tits are bigger than her best friend's. You look and feel and before you know it, your twin sister is bouncing on your dick and begging you to impregnate her to make her best friend jealous!