And she probably has a house rather than a tent, and wears clothes rather than a barrel or fig leaves. Right. Better she pay off the big company extortionists with her money than insist on living under a dry roof.
She may have and out under the states "Foreign Corporations Law". For example, if they sued her in state court and Wisconsin is similar to several states like Ohio, she may have an out.
If the company is not incorporated in the state, or licensed to do business in the state, and are in a business not considered to be "soley interstate commerce", she can use it as a defense and have the case dismissed.
Civil laws change quite a bit over time but I (pro se)used this in 1994 in suit involving $20,000.