Btw - on keeping in touch with ex's family...
When I first met my now XH, I met his XSIL. Boy, did she bitch about my XH's brother! Her XH. He'd had an affair and left her about 10 years before.
I thought:
- you need to get over this love
- ooooh, creepy, why do you still go and see his mum? Are you after some inheritance?
I'm not proud of these thoughts, now.
Because I'm the XW of XMIL's second cheat of a son. I am that XDIL now.
Guess what?
18 months on, I still go to see her. Guess why? Because she's my daughter's grandmother. Blood relative.
And you know, I haven't posted on my Facebook about his cheating. But having not bitched about it, I actually feel closer to spitting it out (kept a secret from his family for a reason) now than ever before. I'm less angry and emotional about it. It's not a venomous impulse, more one of fairness and justice - why should he get away with everyone thinking he is wonderful?
Perhaps she knows of your engagement and she mentioned the cheating as a warning to you. A nice warning. I know I feel I'd like to tell my XH's gf that he's cheating on her, just to spare her what I went through. Not to be a bitch.
You would do well to take it as a warning, anyway.