Imo
I think it's about control. He resented her not being a stay at home mom, he resented her high flying career, He resented being her own woman. He couldn't control her like he could control his *advertiser censored*. He resented her independence. He would show her like he showed his horse in the trailer, or the horse he rasped in the stomach.
Possibly, but I think the primary reason was that to start with, before KB, PF was not a big-time prize, a tenant on a tiny farm, with an old mom, and working in a struggling industry. I don’t know the details of his life with KB, but to me, the relationship did not have much future, and plus, they lived separately, but too closely.
Their parenting setup, when they lived separately, 15 min away, and shared the kid, was very shaky to start with. It would work only if they would, with time, fall more in love and work towards moving in together. I think that moving in together, eventually, was the assumption. But the weak part would be - what if either of them, or both, fell out of love?
Should PF fall out of love and find someone willing to live with him on the farm, KB, at least per my expectations, would mind her daughter being raised by another woman, big time, and move out. (We assume she wanted to move to WA, but maybe not even that?) I think her first move would have been closer to Doss. She was independent and capable to grow. But even close to Doss would mean, PF’s mom would lose the chance to see the granddaughter on a daily basis.
Should KB fall out of love and develop another love interest, no way would PF allow “his” child be raised by another man. He is very controlling.
I think the situation would have straddled PF’s prospects of dating as women are territorial. It was not easy to start with, given that tiny farm and an ailing mom. Probably not too many takers to start with, and I explain KB’s moving in to CO by her relative inexperience in Inet dating. But even with that, she was probably not eager to live at his farm. And now, two years later, he was still a tenant on a remote farm, with an even older mom plus a very young child to whom his mom was attached.
And any move of KB would mean, paying her child support, and PF was already struggling financially.
So I don’t know what happened, and who was involved, all the details, but it seems that PF was in dire straits, marriage-wise, to start with, and now the whole construction became too convoluted.