Have you seen girls flirt with older men in front their boyfriends?

I was hanging out with a friend and some of her friends. A group of of us. One of the girls was with her boyfriend, but she spent the ENTIRE night hanging all over this older guy (40s) right in front of her boyfriend, and he kept buying her drinks. Super weird to me. Have you seen this? What do you think?

Have you seen girls flirt with older men in front their boyfriends?
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