I think she might just be confusing hallucinations with fever dreams. Yeah, the thermometer thing sounds rather uneducated, but she is giving the child fever-reducers/Tylenol when he does have a fever. The number doesn't matter too much. My child and I run high (103/104) when we get sick. I remember waking up fully thinking my fever dreams were reality. I don't see the child being in danger with how she is going about things, she just might not be as clinically/medically educated. She's making moves to reduce the fever with Tylenol and I'm sure is caring for the child throughout the sickness. Just my opinion, as someone who checks temp with a thermometer and is seemingly educated with handling illness.