Step-Sister Comes Home From Rave Feeling Ecstacey at Every Sensation

I hate staying up late waiting for my step-sister to get home, but I always cover ass, which is more than she does when I see what she is wearing when she gets home. She is SO HOT she should never be dressed like that with guys around. And she is definitely feeling some kind of "party pal" because she can't stop touching herself all over, wants me to touch her, almost looks like she wants to cum from just sucking my finger...I should stop it, but she has made little comments and done things for a while that tells me she is just letting out what she was holding in.