Am I Required to pay Alimony if Months After my Wife Leaves me, I Get a HUGE Promotion?

I live in California. My wife left me in April 2021. To date, I have not been served any divorce papers. She was helping me pay on our $1,900 mortgage by contributing $500 each month. So, it put me in a financial bind when she left me. In August 2021, however, I received a $31,000 promotion and can NOW afford to pay the mortgage on my own. She doesn't know how much I make now, only what I used to make when we lived together. She also has a job and lives in her own apartment and said that I can keep the house. My question: Given the fact that my salary increased AFTER she left me and that she has a (lower paying) job and can afford her own apartment, would there be any reason, by law, that would require me to pay alimony? Thank you for your time!