member of a biker gang has a relationship with his son that is everything but fatherly

the wife didn't die but bailed out soon after his son was born, and he was like well that going to raise him myself 

I like the idea of them having had a very open relationship the entire time he grew up, open in the sense of it was okay to walk around and such because they were just a couple of dudes and it was fine but now that the son is older, things are changing and taking a more romantic and ual turn. that's how you want it to start? the dad catching the son ing to thoughts of his dad ing him? the son didn't lock his door because he's so used to them being so open with each other so he didn't even think to lock it