This isn’t a normal reaction or is it ?

[AbsolutelyfedUp]

If your teenage dc was extremely rude to you would your dh step in and say something as well if they heard ?

DD has been extremely rude to me - I immediately told her it was disgusting disrespectful language and to apologise. Dh was literally right there. Didn’t say a word.
I asked him why he hadn’t said anything he said he doesn’t need anyone to fight his battles for him so why do I ? It was more that I wanted her to have both her parents saying this is not ok - he doesn’t agree . I’m pissed off. I feel like he just didn’t want to be the bad guy ?

I don’t think saying something like ‘don’t speak to your mum in that way’ eg is being mob handed!

It would depend on the situation really and I'd expect dh to make the call about whether setting in was needed. If I had dealt with it, said what I needed to say, and she understood my expectations, I wouldn't expect him to get involved as it might seem like undermining me. If there was still talk back and I needed someone to back up what I already said, yes, I would expect dh to step in and explicitly agree with me so that we were a unified front. It would be so situation dependent though.