A year or so ago I found out that dh had been very friendly with a colleague - daily lengthy emails, text messages etc. Nothing much else (she is overseas, they met on a course abroad), though dh admitted to a snog when they met in London. but the relationship had become rather flirtatious, including exchanging valentines gifts and dh also writing and recording a love song.
Dh agreed to stop the correspondence and seems to have done so. It did hurt that he had managed to hide everything so well - it was purely due to an ill timed email that I found out - he was very deliberately hiding his tracks. We have been in counselling, and whilst I don't entirely trust him, we're getting on OK. The correspondence would have lasted 3 months in total.
I have been searching on Friends Reunited and noted the dh had updated his details recently, including in his list of "20 favourite words" a phrase that seemed to be significant in his correspondence with this woman (it was the title of the song he wrote, plus featured as their chatroom name - may have other conotations - I never saw any correspondence). Searching on this woman's details she has also included it(both have updated their details in the last month, she did so first).
Am I being paranoid in wondering whether they are still in touch or trying to communicate? Should I say anything?