Tenant signs lease yesterday, next day wants out?!

[William S.]

I have a tenant that signed a one-year lease yesterday. During the interview process she said she was downsizing which is her explanation on renting. The very next day (moving day) I get a phone call saying she wants out of the lease because she is closing on a home this summer?! She still wants to move in but only rent for three months, not the full twelve. What would you do?