I work in the same company as my cousin's DH (lets call him Sam). Cousin and I are not particularly close but I obviously have some family loyalty to her.
A couple of months ago a new woman (Sarah) joined Sam's department and Sam and Sarah work quite closely together. Sarah is about 10 years younger than Sam and is recently divorced and is apparently feeling a bit bruised about her ex moving on. I've noticed that Sam and Sarah spend quite a lot of time together, for example whenever I go to the canteen they are having lunch together and she has joined the same gym as him. Sam is a nice guy who has quite a lot of female friends so at first i didn't think anything of this. However, last Saturday there was a big company BBQ. Partners weren't invited and lots of drink consumed. At one point I happened to come across Sam and Sarah, she was obviously upset and he was saying something like 'if I wasn't married I'd go out with you'. I've since heard from a colleague that he also told her that she was a 9 out of 10 for looks and personality. Now he may have just been trying to build her confidence, and had reduced boundaries due to the drink but I think if he was my DH I'd feel uncomfortable with this behaviour and want to know about it. Should i tell my cousin?