Why did this girl send me a snap of her friend rubbing her boobs and twerking?

This girl and I have been talking and we have hung out a few time but we are by no means dating. She went home for the summer (Europe) and we talk through snapchat. We dont respond to each other in a timely manner because its a nine hour time difference. She sent me a snap yesterday of her friend grabbing her boobs and rubbing them together. Right after that she sent me a snap of her friend twerking. Why and what would the reason be to send those two snaps?
Why did this girl send me a snap of her friend rubbing her boobs and twerking?
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