Yeah that's pretty common. They seem to care little if there is actually something there to hatch lol
If you have no intention of hatching with her then seperate her from the nesting box for three full days and nights and I find they forget about it.
If you just leave them go they can sit and sit for weeks and weeks. Often a lot longer than would take to hatch eggs. All the time getting skinnier and skinnier and not producing any eggs for you to eat.
I guess I did not explain my problem completely She does not have a nestbox. She lives in house with me and her nestbox is the bottom of her cage! I take her outside for a couple hrs or more, she is loose in the house "with a chicken diaper" hoping she will forget about setting, but she does not. Down to bottom of cage with wings spread looking like a hen setting on eggs. It would be alot easier if she was using a nestbox. I need help!
Hmm that is going to be super hard. I think I've seen a thread on house birds. Maybe ask there for advice or edit that into your title so people with indoor chooks may notice it.