What a BITCH my step-sister is....she's been fucking my step-son behind my back for years.....I knew she was and I set their asses up.... we're all spending the weekend together, step-sis,my step-son kevin and myself, step-sis and I were playing an innocent game of cards when kevin walked in, they are not kidding me, (I saw how my step-sister checked him out when he walked in)...well it's time for me to make an excuse to leave (then I'm going to catch them) ..... yes there they are all snug on the couch fucking away,(they didn't even notice I walked in)....most step-mom's would be pissed, (I w... Show more