Pink Onesie Fiasco

Story - My stepsister and I have a had a secret for awhile, not the kind you want anyone finding out. I sneak her into her room - she's face down in that hot little onesie. I pull the flap back to get a look at her plump ass. I get too excited and shove my hard cock inside her, she is DRIPPING wet! As I'm pounding her from behind she turns around - it's NOT my stepsister! My hot stepmom is staring back at me, this was a trick! She tells me I can't touch my step-sister anymore, but that I have to keep fucking her juicy pussy until I cum in her mouth. Fair trade!