I strongly suspect in the second half of season 1 or in season 2, if there is one, Maggie Foster's children might make an appearance. There might a sailing ship from England and her children could arrive on it looking for her. The children would be around Charlie and Danny age by then.
Maggie Foster assumed that her children were dead. That may not be the case.
That would feinitely be a storyline to follow-up if they wish...i suspect that might be season 2.
I think they might instead show Aaron's wife...and a child he didn't know she had. So he's going to have to deal with being the dad of a teenager. (I'm also predicting that she does NOT hook up with the warrior guy they walked with -- though they will make it seem that way in the beginning).