I wasn't sure whether to post this in AIBU, Covid or relationships, but here goes.
DH brother passed by our house today and asked to come in. DH asked me if that was ok and I said no, given we are in lockdown and he would just be round for a social call. BIL had a tool in their car DH wanted, so asked me whether BIL could drop it off. I agreed, but when DH was downstairs I could hear them chatting and laughing inside. BIL was inside the house for about 30 minutes, and when he left and DH came back I basically told him that I was absolutely fuming and that he had been disrespectful. He apologised, but then said there was nothing he could do about it now and he hadn't explicitly asked BIL inside, it had "just happened".
I am devastated and don't know whether I am overreacting. Several times in the evening he's tried to talk to me as if nothing happened, like he's already said sorry so that's that. I don't know what to do now really. It's not as if there are lots of things that bother me about DH and this is just another thing, but his casual somewhat attitude to the pandemic and his disregard of my feelings is upsetting me. Do I just need to get over it? There was really no reason for BIL to be here, and he just saw him at Christmas. It's mainly the fact he asked and I said no that's bothering me. I don't know how to handle the situation.