Regardless of why she is living at home, if she is not paying rent or helping out with groceries, bills and such and allowing her parents to support her, then I think her parents have every right to ask her to live by their rules, whatever they may be. Everyone has different ideas of what is moral, and if she doesn’t agree with her parents’ ideas, she should move out. Of course, we don’t really know what her situation is. I think Abby was being a bit sarcastic, but she made her point. It’s really not a complicated situation. The girl needs to grow up.