I am not a lawyer nor do I play one on TV. My former job kept me around a LOT of them. One did a study on post-divorce litigation and why. One rock-solid conclusion of the study was that lawyers don't play nice before, during or after divorce. The other good conclusion was that all that nastiness didn't have a positive impact on the children (as evidenced by court-ordered treatment and counseling).
The purpose of a chevauchee is to show that your sovereign can't protect you and to deny victuals and labor since the land can't be worked. It's a Bronx cheer on an army scale. So far STXW is denying you counsel and employment opportunity. How can you change the game? Can you turn this into a war of attrition or a media campaign or irregular warfare?
Henry V resurrected the chevauchee and came out with a stunning victory against all odds. He also died of camp fever. The odds favored that end for Hal because of his life of constant campaigning.
I like the OurFamilyWizard. Are there other ways that you can change the game? I only worry about you and themselves.