Pre-pregnancy all Kristen and Luke would talk about is how much sex they were having and where they were going to live. It was like they were in high school and thought talking about how much sex they were having made them sound edgy. It was cringe, honestly. They also never really seemed like they agreed on where to live but had just decided that they weren't going to leave LA for the moment.
Now that the baby is here and they aren't having sex and living in a place Luke claims to hate, things are tense. Things would likely have been tense no matter what, a new baby is a lot for everyone.
Any way, my point is that I saw this coming and I'm shocked that they didn't. There was nothing about their relationship that made them seem like they were ready for a baby. Regardless of any post-partum issues, having a baby decreases the frequency of sex and living in LA is never going to be like living in Colorado.
It's not that I don't feel bad for Kristen, she's in it and it's hard. It's that this is the exact scenario she and Luke set themselves up for all along.