(Before translation) I can guess that Jo'on thinks Shion is masturbating, but why is Shion sucking on tissues and then leaving them on the floor? Something about staving off hunger?
Maybe these are lemon/orange tissues and she is sucking the juice out of them.
Are you that hungry...?Aah... it has a sweet taste when you put it in your mouthNee-san, What is this!?
What are you doing!!?
Could it be growth?Wha... What are all these used tissues!?