but this was post-divorce Daniel, who had grown up quite a bit.

He could be joking even since Miranda says he could do anything expect for being serious

He was saying (probably jokingly) that if their mother found out, she would have him put in jail. You know, those scenes where an inmate's family or friends or whatever are visiting them in prison and they have to sit in a booth with glass separating them and they have to talk through a phone set? That's what he was referring to.

My guess is that Miranda would still plate class in front of him for the only way he be able to see them