The thing I found most curious was the fact that she didn't reabsorb her follicles despite not having been bred but instead allowed them to go full cycle.
A friend of mine made a suggestion that makes sense to me. I had a spare tub that wasn't being used on one of my CB70 breeder racks, so instead of leaving it empty, I moved this girl up early from her small sweater box tub figuring she would appreciate the extra space. So, she had breeding going on all around her in pretty close proximity. I wonder if the smells of all that breeding were what stimulated her to finish her egg cycle instead of reabsorbing the follicles despite not having the stimulation of actual breeding?