Yes the week-end will bring out the worst in him. He'll have to tell his feral kids there is no party, (& actually no Pithy,) he'll need to entertain his own children, in his own small flat, pay to feed them & deal with their behaviour & their mess on his own.
He'll need the mattresses by then, which is why he hasn't yet collected them, as he's hoping for an about turn before the w/e.
Not sure if its been suggested, but In the aftermath of a difficult rupture its often suggested to do some self care, to reset your brain to your new situation, like, New fantastic Egyptian cotton sheets in your colours , or towels, curtains, rug... Change around the furniture.
Deep clean all his stuff from the bathroom, (ie. all his pharmacie/eye drops/ Deep heat.) so when you open a drawer you don't come face to face with little reminders.
Buy yourself flowers, put them in the sunlight.
Maybe even ask you son if he wants another/ bigger bedroom, redecorate it.
I do agree also with the many excellent posts, that he can't rock up with breakfast. It's too late, you have seen who he really is, the man that couldn't even bring you a coffee. Promises are baseless, you have seen his "go to" persona, you pleaded repeatedly for crumbs. You weren't worth it then. You don't want it now.