3 hens sitting on eggs

I currently have 3 out of 6 hens (that are all sisters and grew up together -- plus according to the person i bought them from there mother raised them and they lived with there mother for a year and half afterwards) anyway can they be kept together if any of the chicks come out? do i remove the rooster? they started sitting on the eggs about 2 weeks apart of each other. i kinda think it would be cool to see baby chicks running around the green house.

If you could have them in a safe place with food and water available while they brood and hatch that would be good. A place where they are protected from other hens and the rooster would help your chances too. It would be a good idea to mark the eggs so that you know which ones have been brooded for how long. Other hens might add eggs to the pile when the broody goes for a drink or food if they have access to their nests. Some hens may takes eggs from others nests too. As long as they can keep them warm, you're bound to have chicks eventually.

Best of luck