Bi Dude Seeks Okay To Bend Over Hot Daddy's Library Sofa

Savage Love Letter of the Dayby Dan Savage
Twenty-six-year-old bi male here. Quick question: How bad would it be for me to hook up with the former stepdad of a woman (my age) I briefly dated? She and I did have sex, but things only lasted a few weeks and never got serious. We parted amicably last month.
I met her former stepdad once, when she and I went to lunch with him. He's a nice guy, good conversationalist—and totally the sort of "daddy" I have been fantasizing about since I was a tee