Since birddog is the principal income, the credit is in his name and he can request her cards be denied, or they can close accounts and mail him a new card in his name only. But, don't do this until after the decision to keep her or not.
Yes.
But you want to be careful with decisions like that because if it comes down to a judge deciding your fate, it may appear as though you tried to punish her. Or make her life miserable.
Unless you can articulate why you did it. i.e. she charged $4K in a day. Drained a checking account, etc.
That's why step number one is GET A FUGGING LAWYER.
Clark