Tenants getting divorced. Contacted by husband about lease

[Kevin C.]

Short and sweet: These tenants were approved for our rental based on the husband's income. The wife did not work at the time, possibly still doesn't. I was contacted by the husband today asking me if it would be possible to remove him from the lease and leave his wife on it. Unless she now has a job, I don't see how she could possibly pay for our house. We are going to the property on Monday for an inspection so we can talk to the wife then, but what should we do in this situation? If she has the income, do we terminate the old lease and write a new one? This would give us a chance to bump the rent $100  or more. Or do we force him to stay on it because he did sign it, after all?