Why would a female look another female up and down often?

There is this new girl who has recently joined my job and so I am training her on various procedures. I’ve noticed since she started the role whenever we had to interact she’d look me up and down in a judgmental way, in particular focusing on my stomach and hips and this makes me feel quite self conscious, like she’s judging me. This happens in almost every interaction she will give me the once over and eye me up and down. I don’t dress funny I dress normal to work in smart wear or a formal dress.

When I first got asked to train her she was off about it and made out that she knew everything I was training her on. She made a point to correct me and tell me what I was doing wrong in my training.

Why would a female look another female up and down like this?

Why would a female look another female up and down often?
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