Broody chicken

We had a chicken go broody last Saturday.  She planted herself in the nesting box and I haven't seen her come out since.  My kids said that they've seen her come out a few times for food and water, but she doesn't stay out long.

Last year we got a broody chicken and 5 chicks from a neighbor.  We lost all of the chicks to hawks.  I contacted her again and asked about getting chicks to put under this bird.  She suggested that we just let her hatch fertilized eggs.  That sounded like a good idea to me.  I went picked up a dozen fertilized eggs tonight.  Then I removed the bird from the nest box, put the eggs in, and sat the bird on top of them.  Now I just have wait 3 weeks for them to hatch.