My sister got married. Her husband is a rather unremarkable, slightly older guy at first glance. But after meeting him a few times, it became clear he's an incredibly perverted person. I'm actually a closet pervert myself... We're enjoying ourselves as sex partners, able to release our sexual desires together. My brother-in-law and I have the best relationship, being each other's outlet for our sexual fetishes. Of course, we're keeping it a secret from my sister. But I wish I could have married him...