Ummm...no. And.....no.

He can take S15 out to eat on evenings that he wants to see him. He can buy his own groceries. Remind him that he has LEFT HIS WIFE FOR ANOTHER WOMAN and that you are no longer cooking for him. Don't let him cake-eat and enjoy still having those parts of the relationship with you while he's out wooing the OW. Let him get a realistic idea of what his life is going to be like without you.