I'm uneasy about it. They bumped into each other randomly a few weeks ago and since then she texted him suggesting they meet for lunch, no invitation extended to me or our toddler, who she knows about.
My husband was with her for 10 years, having got together at uni. She cheated on him so he ended it, then I came along (he vaguely knew me at uni but we bumped into each other years later and that was it - engagement, marriage and child.)
The reason I'm uneasy is because she internet-stalked me on a daily basis for about 10 months when I was first with my husband. I don't want to out myself by going into details about how I knew - suffice to say she had a very specific IP address. I felt it was in the realms of the bunny-boiler at the time, although she wouldn't have known that I was aware of her checking up on me. She wasn't stalking me to intimidate me - I think it was just an obsession for her.
If she had texted my husband to say "I'd love to meet you, hillfort and baby hillfort for lunch" I might have felt better about it. But the invitation seemed to have been for my husband only.
I trust my husband completely, and am happy that he has told me about the text, and hasn't replied to her. He said that nothing would ever happen with her, and he is totally committed to me and our child, which I believe.
I do feel though that we have all the daily domesticity that goes with parenthood and it's inevitable not as romantic as it was at the beginning. If he met up with her, it might remind him of his happy carefree uni days, and even though I know wouldn't cheat, I would hate it if a meeting with her made him wistful for these bygone days. I also felt he discussed it with me for too long; I made clear I wasn't crazy about them meeting, but he kept asking me, instead of quickly accepting no for an answer.