When i first started dating DP (18 months ago) he told me that he only dealt with ex wife when necessary and picked up his children at the garden gate. They are age 13 and 14. Over time it has become gradually apparent that this is not true and that him and the ex seem to have a very close friendship, calling each other everyday. She comes in for coffee during pick ups and sometimes asks him to do favours around her house, things like DIY. Me and DP do not live together.
I believe it is platonic, but I still feel very uncomfortable with this. She comes round when I am there and acts nice to me, but I don't like it and feel like she is invading our relationship. DP says this is not true and that she is just being friendly and that I am insecure and don't need to worry because he loves me. I have no problem with them being friendly for the sake of the children, it's just that in my mind it is beyond that. I can't describe how I feel like this, but i just do.
I would like people's opinions on this because I don't know what is normal in these situations and I worry that I am being jealous for no reason.