Seems like a wet sneeze that she truly just let escape. I don't see signs of her even trying to cover it when walking up to her friends. Not even turn away. Does Twi have bad sneeze habits?
She has shown better habits in the past such as turning away. Especially from friends, but I think around her family she is more relaxed. She has sneezed around Spike, and has sneezed on Starlight and Moondancer in the past. An early episode, her snot got on all of them. But around outside friends, she seems to be better at protecting her sneezes. Not sure with Lawrence around her. She did sneeze INTO him but not on him that one time.