Watch for her going off going Broody ..and not taking care of the chicks anymore ..
Most hens are Broody for about 2 months ..then they release the chicks ..on their own
She has hatched out chicks before and is a really good mom. She shows them all the ropes pretty well before leaving them and usually integrates them into the flock. At first i thought id have to seperate them from the flock since I have some 4 month old roos giving them trouble but they are good now.