Well, Paul's a slick one, isn't he? First he cons Maggie into arranging a meeting with Carolyn (and frankly, if I were Carolyn, I would have been ticked as hell). And what was with all the smirking on Maggie's part??? Gee, I mean, it's common knowledge the guy abandoned his wife and baby. Even if he wants to make nice with his kid now, I would think that common sense would tell her that just maybe this is not the time to go "surprising" her good friend or for looking like it's a great joke.
The fact that Carolyn wants her father, I can buy. The fact that she's apparently blocked the few things Liz told her about Paul that suggests he was never going to be giving Hugh Beaumont a run for his money, I can also buy. Denial, after all, seems to be genetic.
But my God, does she have blinders on. He can put any spin on the circumstances of his leaving he wants, the fact still remains he was stealing from her and taking off.