You see your stepsis going inside her changing room. And can't help but checking her while she is trying on different dresses. She is so hot, such a turn on.
But your stepmom saw you. And she comes to you another day to confront you about it. She doesn't want you looking or getting near your stepsister. And to convice you, she gives you a handjob, you are only hers.
But your stepsis hears all this and her bratty attitude won't let her stay quiet. She comes to your room another day to tell you, your stepmom won't tell her what to do. So she gets naked and makes you finger her while you jerk your dick till you both cum together.
But this is not over. Your stepmom wants revenge. She is really mad, so she fucks your brains out in the middle of the living room.
And you know what's gonna happen if you tell your stepsis... you are not stupid and you want more. Of course, your bratty stepsis ends up giving you a sloppy blowjob till you cum inside her mouth. Cause she wants chaos, and you are happy with it.