Yesterday my ex of over 20 years phoned me and we had a 10 minute chat. The context of this being our children are dating, and we had a bit of a catch up about family, the fact we are old enough to have children dating
and how we were. Over the years I have had sporadic contact with him as we are still local to each other.
My husband has completely lost the plot, saying I was neglectful of his feelings and left him “sat in the other room waiting”.
My husband was putting dd to bed when ex phoned, i immediately told him who it was afterwards, and thought nothing of it.
Dh has spent the last 24 hours pretty much ignoring me, and making passive aggressive remarks.
I genuinely don’t understand the problem, I have never given him reason to doubt me, we have been married forever, have children etc 
I have asked him to explain to me In idiot terms what I have done wrong, and he keeps saying he has already told me, and the fact that I still won’t accept and apologise how out of order I am, is making him even more angry.
I usually end up bowing down to him just to keep the peace, but I honestly don’t think I have done anything wrong 
Am I missing something, aibu and a bitch?