What's it mean when a girl cups her face when talking to you?

The other day i was talking to a girl I've known for a little while, and noticed she was cupping her face like in the picture below when talking to me (also facing me), does this mean anything?
Whats it mean when a girl cups her face when talking to you?
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Just to add, she showed numerous strong signs of interest signs of interest this same day. She was looking at me a lot, sometimes while smiling or laughing, she put herself around me, called me by nickname a lot, open body language, and more. she's also showed signs of interest everyday I've seen her for the past couple of months, just wondering if this is another sign of interest. Thanks.
What's it mean when a girl cups her face when talking to you?
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