Would you get offended if your husband/boyfriend says this to you?

I’ve been married for about 9 years now. We have an open relationship, and during that time, we’ve met a lot of people. Nothing wrong with that. We usually tell each other who we are talking to or who we’re together with. Well, today my husband told me that one of his ex-boyfriends hit him up on Grindr. It kinda gets me thinking, but nothing crazy. Well, the husband then tells me his ex-boyfriend was telling him he would like to come over to fuck me. For some reason, that struck a nerve, and I went off on my husband. I told him it was very offensive that he would let his ex even think he had a chance to be invited to our house to have sex with his ex’s husband. Did I overreact, or was I just being crazy?