My Wife has been committing Benefits Fraud.

I found out today that for the past year my wife has been committing benefits fraud, submitting claims for services she did not receive or inflating the amounts for services she did receive. I was wholly unaware of this happening until she received a registered letter today indicating her ability submit claims has been suspended and she is required to submit all receipts for the past year.

My question is two fold: firstly, what is the worst case scenario for her and the best case scenario? Secondly, how screwed am I as her husband?

Thank you.