At my wife's parents' place, I was alone with her older sister who seems to be past her prime for marriage... Recently, I haven't had sex with my wife at all, so I got drawn into a delusional mode where she was seducing me with her soft feminine charm. As I stroked my erect penis, I was actually caught by my sister-in-law. Shit, this is bad, I thought... but to my surprise, she responded like a goddess with her pussy.
