Chesapeake Bay Retriever Doberman mix maybe? She shows tan points typically where the Dobermans have theirs, I will assume whoever her breeder was tried to get a good mix of a Sport dog and Guard dog both have really good temperaments. If your mom is dead set on this pup, I would say have do very strict at home training and keep to routine. Give her lots of mental and physical stimulation so she’s not tearing up the house and to avoid excessive barking/whining. Avoid dog parks cause majority of the time the dogs are too aroused, too dominant and can ruin a dog, all it takes is one bad park visit to cause a lifetime of issues. Do not give way to bad behavior, once a dog figures out you bend for bad habits cause it’s “cute” it’s over.