You shouldn't expect people to like your kids.
Paul is taking care of his child and is talking to his friend on the phone who doesn't have any kids.
Paul wants to catch up with his friend.
Paul lets his friend know he is watching his child right now, so they just catch up over the phone.
Paul invites his friend over to his house without telling his friend that he is watching his kid.
Paul's friend enjoys his conversation with Paul, and they catch up on a few things.
Paul's friend is let down to see the child when he arrives at Paul's house and doesn't have much fun.