Girl asked if she could fix my collar?

I went out recently and met a girl. I hardly knew her.

We were talking, at one point she was looking at me and she said, you mind if I fix your collar? I said it's okay, and she did, she was also touching my skin / chest and looking straight into my eyes. What could this mean?

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And she put her glass of beer to my mouth.
Girl asked if she could fix my collar?
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