If a random girl just sits on my lap and hugs me what is she doing? What should I have done?

So my friend was trying to hook me up with a girl he knew. We met at the park and she immediately sat on my lap and hugged me. I didn't really know what to do and just wrapped my arms around her.

I didn't say much and then she walked away. I feel I should've done more but I was somewhat clueless. Probably not the end but it happened so quick that I didn't know how to react.
She liked you
Testing you out for boyfriend material
just messing with you
just likes the attention
other
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If a random girl just sits on my lap and hugs me what is she doing? What should I have done?
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