I do know the person and she talks about her adult children enough. Other employees are like me..we have tolerated this.

We work in open office ..so conversations float far.

Am only referring more to (healthy) sustainability of family relationships in general. On a personal level, I don't see anything wrong if adult child returns to live with parent for a limited time --provided child contributes often/daily to household funds/chores, etc. This isn't a boomer vs. younger gneration comment. But more on family dynamics that is unique from family to family.