I know it is wrong, but I have become obsessed with my stepdaughter's panties. I am constantly sneaking into her room, going through her panty drawer. Going through the laundry, sniffing her worn panties. Having elaborate fantasies of dry humping her, even fucking her, while she still has her panties on.
She is young of course, and has a really big, sexy ass. I know she is sexually active, and thoughts about her letting older men in her panties pisses me off but also makes me so horny.
I am masturbating at least twice a day over her. Of course, my wife doesn't know, since my increased horniness means that I am fucking my wife almost every night (and I have always had a thing for my wife's panties as well).