At the moment, it is implicit - it will turn to "yes" when you have actions for all living members of the family. And to "no" on the turn.
I'll have to check again after the next turn runs then, as the last time was first with that client, as it was definitely not working correctly that time. I'll edit this post to confirm either way.
(as an aside, perhaps when the entire family is dead there should be another status as you can no longer do anything with them...)
