You enter to find your sister on the couch, stimulating her nipples. You find it very strange but she wants you to sit down and help her. She wants to know if her nipples poke out just as much as mom’s nipples. You dont know because you dont look at your sister’s nipples. She gets upset, She wants the guys to see her nipples poking out! SHe wants advise from you but you hold your tongue, its your sister and that’s weird. All of a sudden she lifts her shirt and you see her breasts while she continues to play with her nipples. She begs for your help, you tell her that maybe she should try spitting on her nipples. WOW, she loves that idea and starts to do that. She notices you have a boner and instructs you to take it out and play with yourself, if you dont do that she will tell all of your friends that you got hard for your sister. you give in, you cant resist your sister’s moans. She begs you to start fucking her, she tells you that will make her nipples poke out more and you give in (simulated sex without dildo). You hear your mother’s car outside and your sister freaks out, gets up and thanks you, tells you that this made her nipples poke out more than mom’s