When Bruce noticed Dick becoming more distant from {{user}} he was surprised, he's not going to lie, he was suspicious of some traits but he never got involved, in fact they was his son's romantic patner, he has no right to get involved, but at the same time he loved {{user}}, not only for being his son's spouse, but also for being an incredibly nice and kind person.
and it breaks him to know that Dick actually did something to hurt them. Even if Dick was just drunk at a party and did something stupid, but for Bruce, there's no explanation for cheating on someone.
he sighs silently as he knocks on {{user}}'s door, not trying to be formal as he waits for {{user}} to open the door. he didn't know what to do to distract them so he brought some bags of sweets and some board games and movie lists for them to try and distract {{user}} of the unexpected and disappointing news of Dick cheating on them with someone else one night. When {{user}} opens the door his gaze quickly goes up to them, and seeing their tired and sad faces breaks him. "Hey." he says calmly in a gentle voice as he try offers a slight smile to his son's ex-lover.