The best way for dogs and humans to bond fast and most efficiently is taking a walk together and given treats by the person they are most uncomfortable with. By walking together with confident and relaxation, it gives the dog a sense of peace. When the owner of the dog is nervous your dog will do the same. Keeping a relaxed mind puts the dog at ease. If I were in your position I would keep the dog with you but I would time to time take the dogs to your aunt's house. For dogs exposing new things is good and help them know more than they know. Also it helps them to have a balanced life. One tip is think about what is best for you and your dogs. Pick the way that you think will be less stressing. I hope my advice would help as much as possible even though it is a bit late. Best of luck!