Awww he just wants to be part of the family love. I don't think either of them love each other romantically, but it seems they will develop a familial love first as parents. I think that's a good start to a better relationship.
@Roiya Yes I agree. They don't have to fall romantically in love. It could just remain a practical relationship where they just respect each other as a couple. It doesn't always need to be a straight up romance. Sometimes a bit of realism is fine too. But knowing how these usually go, its probably a slow crawl toward a romantic relationship.