As hard as it may be, she should give the Yorkie to someone who can provide more time and attention to the dog. Of course I thought of you first however hubby

is running interferance, so maybe you can help her find her Yorkie a forever home. I personally would rather place with a person than a shelter if possible. I wish you good luck!!!
P.S. Can you still keep working on hubby? Men may be the head of house but we women can turn the neck right or left.

(a bit of encouragment)