I can see it working either way. I think it would be fun if we could play off of one another within the families, but it would be easier to manage if we each just controlled one family. Maybe each of us could play the core (mother-father-daughter) of each family, and leave side characters, like a brother or a cousin or whatnot up for grabs. It may work better that way if we're planning bits of deception and bloodshed.