As all Facebook users do, constantly get suggestions for people I might know and groups, recently started getting these for two men who on looking had DW as mutual friends, nothing unusual in that , she has far more friends on fb than me of both sexes, but then noticed that one of the suggested groups has all three of them on and related to her birthplace, had a look at their profiles then and only thing in common is they all went to school together, then realised that one of them was her long term boyfriend and sexual partner from school, she’d been sending him messages and wishing him a happy birthday on this group, I know people look up old flames etc and it’s probably a complete overreaction but it really upset me that she did this, especially that she sent them during our first holiday away just the two of us since we got married, so, do I ignore it, keep an eye on the group to see how often they chat or ask her directly about it, I have no idea if they chat on messenger