Your sis caught you jerking off with the door open, again. You don't want her to tell on you, do you? She tries to make a deal with you, but you continue to jerk off. Then you make a deal with her, she helps you finish as long as you don't rat her out for sneaking out with her friends later that night. She takes her shirt off and opens her mouth, but that's not good enough for you. You want to see her ass. She strips off her shorts as she tells you she just got out of gym class, her holes are hairy, sweaty and gross. She makes you sniff them. Your sis is quickly getting annoyed with you, bitching at you to hurry up and finish. You better do what she says or else everyone will find out.