Presuppositions are the hidden ideas in a statement.
If someone asks you if you have stopped beating your spouse, they are presupposing that you beat your spouse. And that’s assuming that you have one to beat.
You could say, “You should know, or haven’t you spoken to your mother lately?” but we wouldn’t advise that. Maybe you could say, “I never started, but I hear it’s hard to stop once you start, have you considered a support group?”