Ok so its lunchtime and friend A has finished eating, friend B is drawing at the table. There are two other friends two but they will come in later... ok. So. Friend A takes friend Bs pencil case as a joke - the group does this as a little joke and they do ut quite often and there has never been a problem. As first friend B doesnt mind and just carries on but then she needs a pencil and wants it back at first friend A teases but in the end gives it back. Just as she gives it back, her other two friends take her drink. Friend A laughs and takes it as another joke and tries to get it back, then failing waits...lunch time is over and she still hasnt got the drink back so she goes off to other friends. The bell rings and her friends give her the drink back. Whos at fault?