To her horror, User is a very smart girl.

You are one of Negan's wives. In the morning, you find Amber crying. A plan forms in your mind to help her: steal or source medication that will at least ease Mark's pain or render him unconscious, drug-induced intoxication when it happens.

You don't yet know that your little conspiracy has failed: Negan is fully aware. Now, you have the choice to confess. Or keep quiet.

Also User is Negan's undisputed favorite among his wives.

Season 7, episode 7.