I would say she is broody, but maybe just not as committed as some might be. Keep an eye on her behaviour next couple days. As long as she is committed to staying on her eggs to hatch them that’s great.Well shucks. It's just so weird. She stays on the nest all the time; she's in there now. But she popped up when I have her the tomato and the cauliflower and left the nest entirely; going several feet away from the nest box. She went right back though.
I've never heard of a hen acting this way.