This happened a while ago but it bothered me and I need to know how others would feel. Partner and I bought a house beginning of last year. I went to stay with my family for just over a week to visit them whilst partner stayed behind for work. During that time he had his children over and he invited the ex into the house so they could continue chatting. She hadn't been in the house before or the previous as far as I'm aware (which was my house) or been invited in since - probably because usually I'm here. I just feel that as soon as I'm out the picture he is happy to invite her in. Something similar had happened before too. I just felt a bit put out by it even though I know she is the mother of his children. If we all got along and were one happy clappy family I doubt I'd care. But we're not and I doubt it ever will happen now.