I have been with my partner for a year. We don't live togethe but plan to. He has a child from a previous relationship who he has 50/50. He's a very involved dad and a really great partner to me. There is just one issue in our relationship and it's his ex.
She isn't his child's mum but is remaining in contact with his child as they all lived together for a while and got close. I think it's fine that the child and this ex have remained in contact and still see each other as it's what the child wants.
What is really pissing me off is the child is late teens, has their own mobile, is perfectly capable of arranging something with the ex without having to involve my partner. The ex even let's herself into his house when she returns the child! Messages him to arrange meet ups and suggests things like all going for coffee together or just the two of them (my partner and the ex) when the ex is dropping the child off somewhere!
I'm sick of hearing her name, I hate it when she messages him, and it really upsets me to think she's been in the house, which always seems to be by coincidence planned for when I'm not around. I've tried talking to him about how it makes me feel but he doesn't seem to get it. I think it's inappropriate how much contact the ex still tries to have with my partner but he doesn't think there's a problem. He says it's just about the child and absolutely not an attempt by the ex to continue contact with him. I find that hard to believe though given everything could be arranged very easily between the ex and the child without my partner needing to be involved.
AIBU and just need to get a grip or am I right to feel uncomfortable with this and expect my partner to take my feelings into consideration?