It is true that about three-quarters of all abuse and neglect that does not consist of scams or frauds is perpetrated by those closest. That, of course, is analogous to domestic violence and intimate partner violence.
There's blocking behaviour. There is behaviour that keeps people away from activities. There are behaviours that look like stalking, harassment and coercion. They are very much based on not letting them see their grandchildren unless they do these things for them.
It's that exchange of power and control that we think of often in domestic violence relationships that is deeply analogous in elder abuse, as well.