Quoting *KatteyBug*:" Okay so far, living with my parents has been Great. They don't rush us, they just get behind us and help ... [snip!] ... matter what I say. WHEW!! Sorry so long, just needed to get that out. Thanks for reading. Any advice I'll take it gladly."
I'd just ignore her, honestly. Make it clear to her that her opinion does not matter to you...And don't give her a reaction from there. For all you know, it might be her getting jealous about a space invasion or whatever, and trying to get a reaction out of you. Maybe even feeling so space invaded that she's trying to convince you guys to move out...? So ignoring her would take away that motivation. Just an idea.
Or she could just be a know it all. 16 year olds can be that way, thinking that they know more than anyone else. Anyway you shake it, ignoring her, or even throwing a word or two around yourself (Revenge!
) might be enough to get her to cut it out.