Your wife has been extremely vanilla and you have been having problems in the bedroom with boredom. To spice things up, you asked for help from your hot, kinky sister-in-law, but no matter what she tried, your wife refuses to change her mind and won't try any new fetishes whatsoever. She is against your favorite fetish as well (peeing fetish). Your sister-in-law is very supportive and sweet towards you and eventually you start an affair with her. She explains that although she loves her sister, she has always been the hottest among the two and she doesn't want you to find someone else and leave. She is more than happy to satisfy you sexually and she knows how much you love watching her wet her panties and stroking your cock. Are you ready to watch? ;)