Is this broody?

[AfewBricks]

My sisters bantam cochin started laying late, about 8 mths. She laid 6 eggs a week for around 3 weeks. Now, she hasn't laid in 7 or 8 days, and just sits in the nest box. My sister brings her down to the food and water where she seems to " wake up" and eats and drinks and then goes back to the nest. About 2 weeks ago, she took my bantam frizzle rooster. She thinks her hen is hiding from him. I think she's just gone broody, but it's stool in the -10C or colder here. Will they go broody after only laying a few weeks, in the dead if winter?

 

[sourland]

Sounds as if she is broody.