***update***
So the social worker, M, came over Monday night. Things seemed to go very well. She was very friendly, complimented many things (my daughter's room and comforter, pictures on our wall, etc), and listened pretty well. I explained my story on everything, including the "devil child" issue. When she asked about it, she had the tone of voice like she was

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M said she needed to meet with Alivia, and also told me of a program that would evaluate and help with any behavioral/mental issues. We set up the meeting for tonight.
I ran late at work, so I showed up three minutes later then M, which was fine since my friend (who was also here on Monday) had been babysitting Alivia at my house today. Alivia did a great job being her normal self, showing off all her toys, etc. She answered all the questions M asked her honestly, in her cute little four year old way.
I asked her on her way out if I had to worry or anything. She said there was nothing to worry about, there was obviously rules, routine, etc. here. She said she has 60 days, just in case there is another report. It is also possible that she will stop by sometime without warning.
I am very comfortable with how things went down. She could see pretty easily how much love there is in this house. She can tell Alivia is well cared for and is top priority in this house. I knew all of this before she came over. I just didn't want to give her anything that she could use against me.

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