A number of years ago I was dating a girl who was (still is) a basketball official, and who later achieved some success. She was T with her back to the coach on the opposite end of the court. I'm L opposite side and it is very loud (close game, etc...) and this coach is on the court yelling at my girlfriend about a missed call. I mean, the expression on his face was crazy. I had no idea what he say saying, but I'm sure he wasn't hitting on her.
I blew my whistle, started running to the FRA, everyone looking to me. I stopped and T'd him up. Going through my mind was, "there's no way you can talk to my girlfriend like that." A humbling experience to say the least. Yes, the T was deserved even though my P was my gf.
AFWIW, she didn't miss the call. She had a great no-call.
I don't think that I would do that again - ref with a gf.