I work with my BIL in the same team and we get on well- it was through him I met my DH. The past 9 months or so my BIL has become very close to a newish female member of the team. She is 15 years younger than us. She is married as is my BIL (I get on well with my SIL).
At first I didn’t really think anything of it- they have shared interests in music etc and both married. But two other members of my team have expressed to me that they are concerned about the relationship becoming more than a friendship. Since then I have kept my eyes open a bit more and there are little glances, time spent alone in a room together etc. Nothing major though. Before my BIL met his wife, I saw him ‘in action’ developing a relationship with a couple of previous girlfriends so I know his style and it does worry me.
Do I speak to my BIL about the fact people are bringing this up to me? It’s making me upset and uncomfortable. Or do I leave it given I have no concrete examples?
My DH has offered to speak to his brother but would it be better coming from me directly?