What would you do

Ladies what would you do if your fiancé sent a message to a girl on Instagram saying that she was beautiful when all her pictures are just her long blonde hair, DD's and legs. She was flawless even I'd admit that. No face in any picture. Would you be mad? How would you handle it. It's happened in the past 3 years ago of him chatting people up I know it was just this once she just replied with thank you your so sweet then ignored him after he said if I'm ever in America youl have to show me all the good bits. She's got quite a few likes so she's one of the insta begs. I just don't know how to handle the situation. I have bad self esteem anyways. Blonde is his favourite hair colour I'm a brunette I dyed it blonde once but the past year I went back to my natural. It just hurts. I wouldn't even be so hurt if he called her something different nut the word beautiful especially when there's no face and just her body sucks.