My Neighbor’s Husband Hit On Me, Should I Tell Her?

Reader Unwanted Attention writes,

My neighbor and I are not extremely close but we do hang out sometimes, e.g. take walks together or have some playdates. The other week her husband hit on me, I was surprised because he has never done anything like that, we barely even talk to each other generally. He told me he noticed I lost weight and I look really great, and he would love to come to Crossfit with me. It is possible that this was just friendly but I really got a vibe. I laughed and shrugged it off.