[ej-momtobe]

I guess if it is just the matter that they used the wrong term (should have said not the BIO mother instead of saying not the REAL mother), I would have just let it slide. Sure it is incorrect wording, but unless I saw something in the conversation to indicate that their intent was to to marginalize the AP or child, I don't think that it would be my duty to inject into a conversation that i was not part of.

An effective way to handle it if you want to say something, would be to politely say you overheard them using the term "real mother" to be "bio mother" and you just wanted to point out that "I know you didn't mean anything by it but APs can find that offensive."