>>97093173>mentor, teacher, father's friend
I'm gonna put the age difference to the side and focus on those.
He is her mentor and teacher that in it's self makes Batman look bad. Like he's been waiting for the moment she gives into his influence and let's him fuck.
He is also Gordon's friend. Not sure if Gordon knows their identities in this movie, if he does that's just creating a new enemy and losing the police force.
Also Batman canonically has always been attracted to powerful and strong "WOMEN".
Women who can keep up with him not just physically but mentally. If they can trip him up mentally he's game.