could it be that my hen is wanting to brood?

I know it hasnt been long enough to really tell but she is acting different than usual. She is puffed up, though not mean and shrieking... this bird is a BO and as sweet as they come. Usually when she lays an egg she immediately gets out of the nest. This time I watched her lay her egg and then proceeded to roll it around with her beak until she got it just right and then she set on it. After watching her for a while I had a thought... what if I gave her the egg I just got from the other BO hen. I layed it gently in the nest beside her and she looked at it stood up and rolled it gently in with the other egg and then set down on them again. I watched her for a while and when I left she was still on them. Dare I hope? If she is still on them when I get eggs from the other couple of hens I'm gonna try to give them to her to. Man I hope this is it.

 

False alarm. She's already off the nest. Shoot. I am really looking forward to a broody. Are they more likely to go broody in the spring?