Underneath the rationalization often lies deep insecurity, jealousy, and a sense of scarcity. Family cheaters frequently feel that life has been unfair to them, and they see family assets as a compensation mechanism. They don't see their parents' money as belonging to the parents or the sibling group—they see it as rightfully theirs, and anyone else getting any is a loss.
Understanding why a family member "cheats" often involves looking at psychological triggers rather than situational excuses:
7 Reasons People Cheat, From A Couples Therapist - Naomi Light
: It creates a "house of cards" effect where one person's mistake can ruin everyone’s reputation.