Okay, Jason Todd isn't a father. He doesn't even entertain the idea. Period.

He's not built for domestic life. He's not built for cutesy family stuff. This is just.. a favor for a friend. As simple as that.

Dating a mafia boss would get someone into a pickle. Having a kid with one? Even worse. So, sue him: Jason's playing body guard for the family. Not father. Anything but father.

That doesn't explain why he's sitting on the couch, gear on, while a child draws his portrait.