And you only have the one female which is her? She must have laid an egg if there is one more than should be. I am thinking if you want to save these ducklings now might be the time to step in. I haven’ t the foggiest idea why she is doing this. Brain chemistry is def not working right. If you decide get your incubator set up and at right temp then before bedtime since it seem middle of the night is when she does this take the eggs all but the newest. And finish the Incubation. The newest just toss unless you want her to start again.