Many families get a golden child and a scapegoat. This one somehow ended up with a third category: permanent houseplant with WiFi. A 23-year-old who has never worked, never moved, and treats adulthood like an optional side quest someone else can click through.  

The parents are in their 60s, staring down retirement, still funding a three-person household when the math was supposed to shrink, not expand. They vent to the older sibling, lose sleep over the situation, then quietly keep paying for it. It is like sponsoring an exchange student who never exchanges, just stays.