Please Do Not add his Sister to his harem. It's highly unnecessary. He already has a bunch of women around him. Why does he need to be involved like that with someone he basically raised?
That's just how most movies are, full of plot holes. I've watched A Quiet Place before and it has the same inconsistencies as the game created in this story.
Ch 34 Just a Reminder, You Can Breathe and Speak!
I Developed The Zombie Apocalypse And Netizens Went Crazy With Excitement