She is divorced from Clark Peddler, and they have a poor relationship.
At the start of the game, Kat works at the Spa, is at level one in that job, and has no skill points. Outdoors, Kat knows Amy Bull and DeAndre Wolfe. Her biography states that she is looking for something, and by analyzing the text clues and her lifetime wish, it is possible that she wants new lovers. Her name sounds like "cat hunter," a possible allusion to her status as a "cougar." A cougar is both a large predatory cat, and a slang term that has relatively recently come into popularity for a middle-aged woman who pursues younger men. This hypothesis is supported by the age difference between her and Buck and by the further bio evidence. Further evidence of this is her clothes, every single one of which has some sort of animal print on it.