My maid has also slept on my sofa and in front of webcam who told me that she was making baby sleep (in fact, baby is alone in playpen while she is sleeping on sofa) when I asked her on phone. And I have found that she wrote record of baby has slept for x hours. But I know it's none from what I have seen from webcam.
I totally understand how pissed off you are. You hate her but you cannot scold her and feel angry all the times by yourself.