Dont hide dear, you should sit and listen and when she ask you if yo have any questions ask her "What you do when the bee wants in the birds back door?"
Gutted, I know it's embarrasing lol I just researched it A LOT lol interesting too, just accept it or tell her to get you a book...You could always have sex infront of her lol and be all proud of yourself lol joke Try the Cupboard?
Listen to her, have the discussion. Its great that your mom wants to make sure youre knowledgeable. She wants you healthy and to not be a parent until youre ready.