Left her, she gives you more time to loot the shop, I wasn't gonna shoot her and then gain uneccesary attention to myself. Our group is more important than one stupid woman who clearly decided to get herself into that position and either way she would have ended up dead. And Kenny then goes and tells the group about it well, if I remember rightly he was the one who said to leave her.
Kenny is a bit off sometimes but I can't help but like him... But I left that woman she was just a distraction to allow me to get as much as I could from the shop.