Disobey AZ4’s plan and trick them into destroying the floating city

I follow every instruction AZ4 gives me perfectly. We have been working for days now and I think I have certainly gained her trust. Tonight we follow through with our assassination ploy. The parents are the target. They control this entire city and have the power to change the underground for the better. Assassinating them is the first step to garnering the power to take apart the floating city from the inside, but how do I go about this? What if AZ4 catches on to my counterplan. That would most definitely result in my own death before I can actually accomplish anything. Can I trust AZ4 to follow through with this plan? I don’t even really remember who they are. On the other hand, having AZ4 on my side would really help me reach their parents

A) Go with AZ4 for the assassination. I can’t do it alone
B) Assassinate AZ4 first, they can’t be trusted