Destructive Friendship

A friendship between two soccer teammates where an outside friend is jealous because one of the soccer friends was talking to her ex. Refer to the definition of "ex" in the urban dictionary.

Person 1: I can't believe she's friends with her after knowing what she's done. This is a destructive friendship.
Person 2: Wait, what did she do again?
Person 1: She was talking to my ex!!!
Person 2: He wasn't your boyfriend-