DH and I are in our mid-40’s with 2 primary aged DC’s. I recently discovered that he has been exchanging messages almost on a daily basis with an ex-girlfriend that he had at university (so 20-odd years ago). The messages are all pretty innocuous so I didn’t really give it much headspace. Talk of shared acquaintances (of whom a number are in our close friendship group), that they both have kids of a similar age etc. However when I mentioned it to my sister, she’s of the opposite opinion and firmly convinced that he’s on a slippery slope to infidelity, emotional or otherwise.
There are no other red flags; no behaviour changes, we live at the opposite end of the country (although he does work in the same city she lives in a couple of days per week but there is no indication at all they are planning to meet in person) and he’s never given me any reason to not trust him.
However with my sisters reaction and the fact that the chat has been going strong for a couple of weeks and hasn’t dropped off before now, I’m not sure if I’m being naive and should perhaps mention it and ask him to extricate himself from the conversation? Any advice?