Don't get to excited until she has set full term.Some do occasionally set but for some unknown reason,they get off before they should and don't go back.There are a few good birds that will set and hatch.
Hopefully yours is one.Make sure there are no holes in your pen.Chicks will run as soon as they see you and they seem to know where all the holes are and some even disappear never to be seen again.Remember to take out all deep water pans and use chick waterers.And don't forget mom will be a little meaner then usual with chicks around.It's always exciting to see chicks raised by mom.I don't think I would leave the male in with her as he may(not saying he will)but may kill them.
In N.H.,Tony.