Update - Ms. Broody has unbroodied herself. I just kept pushing her off the nest, she'd run outside squawking, and then get distracted, so I think she was just a bit confused. I do have two hens who insist on laying eggs in one of my garden beds. They are both large birds who somehow fly/flop themselves over the fence, lay their eggs, then circle the fenced in yard until I open the gate for them to go back in. The rooster has also taken to perching/strutting on the top board of the fence surveying his kingdom, but so far has not opted to leave his ladies.
