STILL broody

I'm not sure what to do next. We've been kicking her out of the nest boxes, keeping her out of the dog crate in the garage and even dunking her in water to bring down her body temperature. Nothing is really working. She's back to sleeping in the coop with the Big Chickens at night but heads right to the nest boxes. I may try letting her sit on frozen eggs next. If that doesn't work, I don't know what we'll do! I am NOT ready for new baby chicks at this time of year and I think the landlords (my parents) would spontaneously combust if they saw baby chicks in our yard.