I think it matches what we know of her personality.Like doing cartwheels in the police station or smiling in the courtroom wearing "all you need is love " shirts.What reason would AK have to locking the bedroom, covering up the body, etc, etc, if she was not involved in murder (in whatever way)?
People normally don't try to cover up crime scenes unless they are involved in a crime, I presume. I fail to see any reason for AK to be covering up crime scenes if she just showed up there in the morning having nothing to do with the crime.
Especially if she was wasted that night and could not understand /process what she saw in the morning.I think AK is the type that would cover her ears if she heard someone screaming,I think she rather live in a fantasy land then to face a grim reality.