Yup, your H is headed for broke soon.. this is GOOD

THe more people he shuts out the more support YOU have and the worse HE looks

Your family doens't have to threaten to shut him out. They just have to tell him

"OW will NEVER be accepted into this famly... she will NEVER be welcome in any of our homes..."

THAT alone is enough of a threat for him to realize his future with this woman is with her or with his family.. they are forcing hiim to choose... as long as they are CLEAR on that and do'nt pad it at all like

"I dont think I want her around here right now"

THAT is not a consequence, its just padding and warning.. its not going to scare him

If they are FIRM with him and there are permanent consequences that he will NOT LIKE at ALL, it will hit home.

This is good.. the worse he gets the more support YOU get and that means the more PRESSURE that's on HIM