It is almost guaranteed that upon the death of the last parent, every resentment—real or perceived—dormant or simmering under the skin of a child, will erupt; the way it manifests is generally in terms of possessiveness, jealousy, spitefulness, argumentativeness, and greed. Often the issue is not even about material possessions but rather the explosion of a culmination of years of often-repressed hurt feelings.
The traditional family unit has continued to erode over the last 50 years. As a result, directly or indirectly, there are likely more dysfunctional families than functional.
Source: Sibling Greed After Death