Okay something has seriously crawled up my mother in law's ass tonight. Just to clarify she normally…

Okay something has seriously crawled up my mother in law's ass tonight. Just to clarify she normally puts Emma to bed because she likes how "fluffy" she is but tonight she woke up after being laid down the first time so I took over. I asked her to do two simple things she asks me to do every time she is putting her to sleep which is to grab something soft for Emma to hold and to make sure the side of the crib is down. I don't understand why she is suddenly being so snappy with everyone.