My chuddiest biological relative is basically exactly him but with less money. It's a miracle he isn't divorced yet, considering he's already cheated on his wife many times over and he makes SV "jokes" about his own daughters.
I have a chud uncle that cheated on my aunt too, these people are pigs.
Shit like that is a red flag. You're right to put that in quotes because a lot of those "jokes" aren't jokes. It's hard to approach the subject with children. You want to get them away from that situation but directly asking if their father is abusing them can backfire if it isn't done at exactly the right time.