Quit claim deed, joint tenancy not married can my ex force sale?

I purchased a house in california with my long term girlfriend, 2 months after moving in she decided to leave me, & move out. We borrowed about $15k from my father to be repayed by both of us, she & I verbally agreed to repay the debt to him, I also provided several thousand of my own money, she provided zero cash, but picked out all items that went into the remodel, carpet, paint, bathrooms etc... We took out a second on the house a month into it to consolidate debt & her name is also on that. I am waiting for her to sign the quit deed. Can she force me to sell? I talked to a lawyer & he said no.