I have and feel terrible about it. But only because what I said was tongue in cheek and it caused their mum to go mental. Which to be fair I would have too if shoe was on other foot.
Now I am questioning whether I want to be in this relationship where the ex is always in my life. She doesn't make anything easy and I can't relax around the kids because anything I say or do goes back to her and she always twists it to cause a row. It's really beginning to cause tension between me and dp.