Your step-sister Ashley is getting ready for a hot night with her boyfriend. You hear her giggling from her room telling her friends how excited she is to be fucked wild in her new lingerie. You can't help but tip toe to her doorway, and peek inside. You can see her gorgeous lace bra and pantie set, with stockings and your cock is instantly hard. You begin to head back to your room, but temptation overrules you. You need to have just one more look at your hot step-sis. Shes coating her juicy lips in lip-gloss, and your cock pulses. She calls her boyfriend, and tells him to hurry, she is so horny waiting for him. You can't handle any more and begin to stroke your dick through your trousers when she glances over and catches your gaze! She is repulsed that her step-brother would be perving! She ridicules you to begin with, then takes the situation to her advantage. She demands you get your cock out and begin stroking, but only on her terms, that if she does this for you, then you will leave her in peace with her boyfriend all night and not tell your folks! You agree early to jerk off your massive raging hard on. Your mouth and cock drooling over her curves. She counts you down, to get you to orgasm, and your toes curl! Hopefully step-sis will make this a regular thing!