Buttons nest

I could not figure out why Button was not laying eggs. After Snap was killed, no more eggs appeared in the nest box. Yesterday the dog was on the back porch with an egg between her legs. Unbroken. I took it from her and watched her, and of course she went back to grab another one. It was under the Hosta Plants off the back porch, I pulled back the leaves and there was Button sitting on the nest. I slipped the egg back under her. Right now she is just laying an egg a day. There is 12 eggs today. I hope she sits soon. it takes 25 to 29 days to incubate. I need her to start so that the chicks hatch out before we leave for 4th of july vacation. Then I will have to pen her and the chicks up so nothing happens to them or take them and put them in a brooder. here is the nest.