Yes, glad to see Nick knows the truth. It would have been frustrating if he hadn't found out til the baby was 18 like they do sometimes.
Nick must not be all that in love with either Sharon or Phyllis if he keeps bouncing back and forth between them. If he's now in love with Phyllis, then the fact that Sharon is having his baby, shouldn't change that. Just as I couldn't understand why, if he was SO in love with Sharon, that he went running back to Phyllis when he found out the baby wasn't his. They could have worked out the whole Summer thing if he'd just make up his mind who he really wants!