It's a good thing his mom didn't hear about the beach visit where he (according to the third party guys) was too good at getting people to hit on him, when Daisuke is just simply too easy - even though it was an act. He'd probably be on the brink of death if she heard that.
I'm wondering what she would say if he was forced to go inside a lingerie store with somebody.
That said, his mom would be a terrible lawyer, basing everything on circumstancial evidence.