Why does a shy girl make strong eye contact while im explaining something to her?

I was in school doing agriculture on the farm. She is shy and does not talk to people, but she did talk to me for the first time. She asked me if I could help show her how to handle the sheep lead which is odd since she has watched everyone do it.

I also helped her at the end of the lesson after i saw her struggling to take off the halter (like dog collar for livestock) off. I then explained how to take it off while I looked at the halter and the moment i looked up and made eye contact she was already looking into my eyes.

What does this mean?
Why does a shy girl make strong eye contact while im explaining something to her?
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