You need to break the broody behavior if you don't want her to be broody. There are several ways, some easy, some not. The easiest way I have found is to remove the hen from the flock and put her in a dog crate with only food and water. No nest box, no straw/bedding. 3 days of this isolation usually gets the hen back to reality that I am not going to let her hatch out eggs at this point.
Other things you can do if the above is not an option for you, is remove all eggs, fake and real to make sure she is sitting on an empty nest at all times. You can put ice cubes in the nest box under her. Put them in a ziplock bag to avoid a mess.
Repeatedly remove her from the nest box and the area if possible.
Her egg laying pattern will resume when she is not broody. Hope this helps.