What’s more, anything she knows about the relationship between the two men will no longer be protected by the marriage exemption from testimony ploy.
That may be what’s kept Bill & Hill together so long
A spouse can’t be FORCED to testify against their spouse but it’s done every day. How do you think you get orders of protection or a divorce etc etc
She could also testify on the nature of their marriage. Their marriage could have been on the rocks already and this just happened to be the last straw. Much of his character was on display during that eight minute episode, plus there are reports of many complaints about him in the past.