Rented from video store early to mid 90’s It was about a family that had an apple orchard. It was a mother, father, and 2 brothers. The mother somehoe (I don’t remember) turns into a monster and the family keeps her in the basement. At one point, an inspector or cop goes into the basement, and she ends up being right behind him for a decent scare.

The father and older brother turn into monsters at the end, the little brother does not. It may have been the apples that did it.