Silkie #1 went broody in December and hatched out 4. She went broody again in April and now has two babies under her. (Sat on 8 eggs the first time, but it was freakishly cold and I don't know that my fertility was all that great. Second round was shipped eggs AND she had quite a bit of interference from the other hens that likely did in some of the eggs.)
Silkie #2 went broody in January/hatched out 4 in February. She's sitting on 8 right now, due in 11 days. (She had 7 eggs, but the temps dropped to single digits and I think some froze. Six of the seven eggs had chick development.)
I fully expect them to go broody again this summer. I have found with my girls that they can realistically cover 8 standard eggs. More than that and they shove them out of the nest or don't adequately keep them warm.