I think Jenn didn't want kids at all. Not going to happen, those were her words. I think that Tim liked the IDEA of having a kid. Having a mini-me he could take to the parks, eat burgers and hot dogs with....Tim didn't know that kids don't come out as 8 year old easy going humans. They are a lot of work. The Trackers don't have a blessed clue what the word work means.
When Jenn mentioned last New Years that she wanted to have another kid, Tim didn't seem into it. Jenn wanted a girl and thought for sure that since she already had a boy and wanted a girl, baby 2 would be a girl. My heart breaks for the kid who is a disappointment to his parents before he's even born.
Life is about to drastically change for them since neither of them are enthusiastic parents. I truly do not believe that Bea is a full time nanny, I think she's a part time babysitter with hard boundaries and strong limits. Time will tell if they bring on a full time person to take care of $liver. Having a newborn is tough, sleep when the baby sleeps, don't worry about this or that...that all goes out the window when you have an extremely needy 3 year old who has never been taught to play alone and they refuse to put him in a daycare/school program.
I really believe life as they know it is over for them and they created the monster situation they are in and deserve every bit of frustration and exhaustion coming to them.