Adopted dog has BAD memories and HATES my husband!?

We have had Abbie (Havanese) since last June. My first interaction with her was with my young son and she was VERY afraid of both us. The vet said she was found in a 6 pack of dogs and VERY scared and they felt maybe she was not going to be able to be socialized. She and the 5 dogs were not fixed, all pure breads and the obvious conclusion was that she was living in an abusive breeder situation. When I brought her home, she was still quite frightened so we put in a quiet room and visited her throughout the day. Then my husband came home and all heck broke loose! She turned into a tiny version of Kujo the wild dog, barking growling, snarling at FULL FORCE. So, we, the dog experts that we are (lol) figure that the breeder or whoever had her was physically and emotionally abusive to her. Her right ear is broken and the vet says she has another broken bone in her face as if she was kicked by some *@($*$& person. This dog was only 6 lbs when we got her, a skeleton of a dog. A year later, she LOVES me and my son, we are home most, but my poor husband gets the same abusive treatment from Abbie everyday. he is obviously remembering the past abuser so how do we change her perception with my husband who really like her and spoils her with treats and pets her... if he can get close enough or she doesn't bolt away like lightening. We joke that she needs a doggie shrink... Your suggestions are greatly appreciated!