To give a bit of back story, long term relationship with partner of 5 years. We have 1 child and one due end of janurary, we live together.
Unfortunately about 18 months ago I found out my partner had cheated. I decided to stay as our son was only 1 at the time and he seemed remorseful. Since then the relationship has been great, it's taken a while to get over and work through but he's done everything I have asked or could want really. I don't think it ever fully goes away and sometimes I think about whether I should have left instead but things on the whole are really good. New baby was not planned but we are very happy about it.
Now for the AIBU..
Nobody in his family knows that he was unfaithful, I didn't want to tell them as we are all quite close and I didn't want any awkwardness, he has a big family with 7 brothers and sisters.
2 of his brothers recently moved abroad to the same place. Both as very different people, one is responsible and wealthy with a great job, the other is irresponsible and will quite often make his money illegally in between the odd job here and there.
The irresponsible brother has invited my partner out to stay for a few days. It's only about a 2 hour flight from where we live. Originally this was going to happen in January but my partner didn't think it was a good idea so close to my due date and I completely agreed.
The other night I heard them on FaceTime (I was in the same room so no secret) chatting away and his brother started talking about how he was going to find my partner a girl for while he was out there to have sex with. My partner looked mortified and started to laugh and dismissed it saying that wasn't what the trip was for. He asked me (while on the phone) if I heard what he said and I said no, which I didn't at the time, but knew it wasn't good. He told me what was said once they got off the phone and I immediately felt sick.
He's told me in no uncertain terms that anything of the sort would happen and that the responsible brother would be with them the whole time and I can call/text any time but to be honest it hasn't helped. I know I'm pregnant so I'm easily emotional right now anyway but I'm so cut up about it. It brought back all the feelings I had with what happened 18 months ago and I feel absolutely sick to my stomach about him going.
He's now said that I'm getting worked up for nothing, I'm actually not worked up although I did have a big cry about it and he told me not to worry and reassured me and gave me a big hug. He doesnt understand how it feels after being cheated on how this can be such a huge trigger. Now I'm dreading the whole Christmas period for when this trip happens although it will be months away yet. AIBU to be upset? I'm also absolutely fuming at his brother for being so disrespectful. He knows I am pregnant and we live together I have met him although only twice due to distance but he knows our family dynamic and I can't get my head around why you would encourage someone to do that to their family.