You tell your sister Anna that you are a virgin and you desperately need to get laid. If you cant get laid you are going to leave college as you don't fit it. She reluctantly agreed but is shocked when sees how big you are. She tries to suck you off but keeps gagging. She takes it missionary but the feeling of you stretching her out makes her scream. She gets on top and slowly starts riding you. You finally admit you are not a virgin and you tricked her but she cant stop now, She cums everywhere. You flip her over and pound her from behind, she tells you not to cum inside, but its too late, you fill her deep, shes not on birth control.