My friend’s hung step dad

Weird as thread. That is your "FRIEND". You shouldn't cross that line. Also, taking voyeur pics of your the stepdad's crotch is beyond creepy and weird. Don't be a homewrecker. Go out and find someone that actually wants you. Why would you want to involve yourself in such a mess?? The dad is married to a woman but might be bi. He will never leave his family for you. There have been countless of movies, stories, tv shows, etc.