My step-sister and I have always been competitive with each other. We’ve swiped boyfriends from one another and even fooled around with each other’s boyfriends and husbands on occasion. I told her about the day I jacked off my step-son in my bathroom and then brought him over to her house to get in on the family fun. Not to be outdone, she immediately started her own perverted routine with her step-son. We are having a casual conversation one day about our new found bond with our step-sons when I could feel the competitive nature between us brewing. When I mention I think we should have a contest, she of course replies that she will win.