This is why it's probably for the best that his low sperm count kept him from being a father. This is because his having a son or daughter is clearly a hidden danger to Elly's self-concept. After all, Phil might take to parenthood better than she did. It's bad enough that Phil is going to be grateful that despite the occasional flare-up of his acting like Red Green, marriage was the best decision ever made for him. Taking to being married and having bills to pay exceedingly well would be bad enough without his finding being a parent almost a breeze. Why, if Phillip were to be a good parent with a well-behaved child who respects him, the damage to Elly's self-concept would be almost impossible to repair. Once again, Phil would win and win and win and she'd be left with nothing.
The only thing that would be more damaging would be actually admitting that her parents don't actually love everything he does and use her as a bludgeon to beat him over the head with when they deliver the inevitable to everything who ain't her speech about his being a disgrace because he's a rootless drifter who lives out of his car while Elly has a family like she's supposed to have. Then again, we're probably dealing with a person who thinks that it's his fault that she feels miserable and angry all the time because she doesn't want to admit that she needs to feel miserable and angry all the time to make the world make sense. It would be like admitting that she's the reason Phil delayed proposing to Georgia in the first place. More on that tomorrow.