Your family members/loved ones have become infected. Will you be able to kill them or will you lock them inside the house and leave?
Personally I don't think I could do it, so I would lock them inside and leave the house. And yes I know that it's dangerous but I could not do it.
If it was my husband/boy friend, I would: "sorry, i just have to move on, i cant live with a dead brain while the world is going for more men than women, your not the only man" and kill him [well, hopefully he would stand still and let me finish that sentence before he attack me...].
But if they were my parents or my brother, I might have to treat them like how Ed was in the end of Shaun of the Death...
Ed volunteered to stay behind with the rifle, more or less.
Sorry about this. It's not your fault.