As you day, could be a legacy of the family system, but it also occurs to me, abusive relationships are sometimes associated with isolating the victim from family and past friends.
I'm not implying that's the case here. I know of a couple of people who kept their beloved dead pet in a freezer.
JMO
Isolating an elderly person from their family for the purpose of taking advantage of them is not uncommon these days. The abuser usually tries to limit or cut off communication between the elderly person and their relatives, then progresses to taking over their finances, etc. Fortunately, many states now have laws against this type of elder abuse.
Elder Abuse and Elder Financial Exploitation Statutes
www.justice.gov