I feel like Whitney set Kathryn up in Seasom 1 and it set the tone for her storyline. Kathryn met Thomas a long time before season 1 even started shooting, but that piece of infoation was somehow left out. I feel like Whitney made Kathryn lie about hooking up him and then he used that lie against her to make her look bad. He was so adamant that Kathryn better make things right between Thomas and Whitney and not say a thing about hooking up; however, when the time came to tell the truth (which is when Whitney realized that Thomas and Kathryn were serious), Whitney let the cat out of the bag and the only one who came away looking like a liar was Kathryn.
Kathryn was hurt this season. I believe that Thomas did cheat on her when she was pregnant and even after she had Kensie. I also believe that she was hurt that Thomas ran for Senate so soon after having Kensie and leaving her to take care of the home and child by herself. He basically missed out on a lot of bonding time during the hardest time of child rearing. Thomas was obviously embarrassed by his family and that was sad.
In the reunion, I could see that Kathryn loved Thomas. I do t think the relationship was about money. This season really weighed on her and wore her down. People she trusted basically threw her under the bus saying she got pregnant to get on the show, but not a sing me person threw shade at Thomas for getting Kathryn pregnant. Thomas has blamed every single person except himself for the loss of his campaign. He never once took responsibility for his loss on the reunion show.
I just feel like this is a sad situation and there is more to the story.