Billy's father is dead, so can't attack. Billy is dead. The mother was not attacked, so she does not attack.

Back at Skyler's house, the sister was the only one attacked, but the attack failed, so I let that one go, but you are correct; the sister should have attacked back. Instead, the father kicked Skyler away. I left it as is so that the story wouldn't get messed up, because that is the objective of the game. I'm being very liberal about the attack rules, especially since we are at the very beginning and hurt quite badly and having been asked to alter the rules to have all adults do 2 damage made it worse for Skyler.

Let's see how it goes. We may need to adjust the number of kills required to gain back hit points. This is a test run, so rules need to be tweeked.