That's the spirit! Your precious boy will become a great guy some day. It goes by SO fast--please believe the people who say this--you will blink and he will be taller than you are! It's happened to me!!
But you must present a respectable picture always--he needs to see how to treat a woman some day. You can not be silly or stupid about his dad. He wasn't a great choice. It's done. Now you need to show your S that men wno behave this way get ZERO from you. If his dad grows up and becomes a MAN, well, it may be a possibility. But he isn't--I'm sorry, because you will miss having a man. But don't mistake this guy for one--he isn't there yet.
