"Oh, poor baby!" Sydney smiles broadly,
"Did that masturbation really make it worse for you?"
Yes, you tell her that it made you much more sensitive, and more of a 'hair trigger'.
You explain that that's why you try not to masturbate when you're playing the game.
You are a bit glum that she has found this out so quickly, but you knew she was going to find out, sooner or later.