Only child

I am my mother's only daughter. Child for that matter. Keep this is mind for the following anecdote.

On the phone with mum. 

Mum "Oh geez, don't hate me for asking this but I really can't remember...you have your tonsils right? Or were they taken out?"

She has completely forgotten what getting tonsils out would involve or the level of involvement it would take on her part if her child were to get an operation. 

It's ok mum, I've forgotten if you've had yours out too.