Is she trying to be y?

So there is this girl in my cl she sits right in front of me( we sit in this big table in cl) and I've notice, she's probably done this 3 time were she flips her work book paper and licks her finger very ily and turns the pages. In my head I was laughing and I was saying to myself, what is this girl doing we talk before but I just found this kid to be funny. Was she trying to be y or something, it look very promiscuous to me I kind of got that vibe ha ha. I she giving a hint or what?