Questionnnnnn.?

How would you feel or think about a boyfriends brother texting him that "there are mad girls at the beach" when you've been in a relationship with your boyfriend for a long time like 8 years. What would you think is going on.? My boyfriend never texted him back, and says that that's how his brother is always talking about girls. But he said it like my boyfriend would have interest in girls that was there idk. Is it wrong for me to be mad about something like this.

He was trying to make my boyfriend go out to his town to chill with him and that's why he said that. It sounds fishy to me.. even though my boyfriend didn't go.