I think I know the answer but it would help to hear from outsiders.
On Mother’s Day, I made a remark to my boyfriend about me having been a mum for X years. He texted his ex-wife to say “Congratulations for being a mum for X years”.
The other day was his DS’s 21st. As we were apart, I sent my boyfriend a text saying congratulations “for being a dad for 21 years, you’ve done a great job” (he had a difficult time with depression when son was born). After saying to me how touched he was by my thoughts, he texted his ex-wife saying congratulations for being a mum blah blah. He showed me a part of the thread as she sent him a photo of the three of them just after the birth (which I thought was sweet).
I don’t know why it bugs me so much. Maybe because I was expressing a genuine sentiment which I assumed as intimate to us, but it’s like he’s picked up my words and passed them on. I don’t mind them having contact - they divorced years and years ago and their DCs are all grown up now. But there was something annoying about his doing this.
Argh! I know you will tell me I’m too sensitive.