Well, she may have squatters rights or be close to common law marriage. I'm pretty sure common law marriage is a thing in Kansas, but I'm not sure about squatters rights.
edit- so she may be able to stay, but she'll never have that sweet sweet equity. ATTN - zoomers and millenials... shit like this is why getting married to your long term partner is important!!!! You can give everything to help someone build a life, but if ya split up and ain't married, they can run away with all the loot. Point blank period.
In Kansas, common-law marriage applies to any couple who is living together with the mutual stated intention to marry. That's it. The duration of the relationship or time living together is not an issue.
Early in the summer, Corissa made a post to Instagram that was all about how much she loves Juliana—but has no intention of marrying her. It was phrased as, "I've already been married once, don't want to do that again, and I don't need to be married to Juliana to prove how much I love her." She was quite insistent upon that point, and it was such a weird post—until she announced that she was buying a house. That was when I looked up the legal criteria for common-law marriage in Kansas,
In doing that, Corissa made an unambiguous public statement that she has no intention of marrying Juliana, which means that while they cohabit as romantic partners, they cannot legally be considered a common-law marriage. Therefore, Juliana has no legal claim on Corissa's business, the house, or any of her cash or personal belongings, should they split, or if Corissa dies without leaving her anything in a will (and yes, I'm being optimistic to imagine Corissa has even bothed to make a will, given her short-sightedness in every other area of her life).
Squatters' rights don't apply here because the property isn't abandoned (and if it was, she'd have to live there for 15 years to gain squatter's rights, and she ain't gonna live
near that long).
Instead Juliana would be considered a tenant and Corissa her landlord, but when you live with your landlord in their own home, and have no formal agreement, tenant law tends to favor easy eviction. Having evicted an informal roommate from my own house years ago, I had to give her 14 days' written notice after she'd refused to leave sooner by verbal agreement, but at 12:00 AM on day 15 I could haul her shit out to the curb and change the locks myself, without involving the sheriffs.