Your sister comes in, big tits swinging in her T-shirt, no bra on. She sits down, steals the TV remote from you, bragging about how her tits are better than those anime girls you watch. Eventually, you end up on a porn channel, desperately hoping your mother doesn't walk in on both of you watching the forbidden footage. Then... she turns to you, emphatic that her tits are better, and proves it by showing them to you. You can see your sister's breasts. In return, she wants to see your cock. Impressed by your size she offers you an evil challenge. She wants to tit-fuck you--- but she wants to see if you can actually cum before your mom walks in-- and she could enter at ANY moment. If you can make it all the way through-- even with your mom standing RIGHT THERE-- she'll buy you that computer you've been saving up for... Are you ready