Do you think this is an appropriate question?

So the other night I went to ask my cousin’s girlfriend some questions about her best friend that my cousin recommended to me. Now keep in mind this was a day before meeting this girl. My cousin’s girlfriend is telling me and asking me some disturbing questions about her friend. She was talking about her friend’s ex boyfriend and why she broke up with him, asking me if I cared what clothes she wears, was talking about us getting married and that her friend wants to have children, and asked me if we developed a relationship that if I was fine with her friend being around me without a bra on. Now I wasn’t surprised she asked me these questions because my cousin’s girlfriend has the mental capacity of a pebble and my cousin even said this. What do you guys think of this?