My husband has been having an affair?

We hired a skinny little brunette from a cleaning service to help at our house. Now I have discovered that my husband has been having an affair with the little tramp. I knew that, as a male, my husband would look at pretty girls, but I was naive enough to trust that he wouldn't go run off with one of them. My first thought upon finding out was to report the girl to her employer and have her lose her job, however I learned that she is in serious debt and struggling to pay her student loans. I am conflicted with feelings of pity and anger. Would I be justified in having her fired?