Sometimes there is no clear answer to a question. Your question falls into this category. It sounds as if you and your neighbor “shared” the mother dog. You actually refer to the dog as your “neighbor’s dog.” The puppies should not be under anyone’s house, but rather the mother and puppies should be given humane care inside one of your homes. You and your neighbor should consult with a veterinarian and then try to work out an amicable arrangement. The mother dog should be spayed as soon as the veterinarian says it can safely be done.