The bladder is half empty

There used to be this weird girl who would sit in class with hands clasped and the eyes focused on the board. People would also make her sit next to this boy who farted a lot. Well she had to sit next to him for about three years. Even though she hated it, she knew how he felt. But there was one thing where she was good at, which was Basketball. That was where people would choose her for their teams, but other than that she would always stand outside in the corner during the breaks. People didn't even notice her anymore, as though she was a little tree that was planted there. She didn't know what isolation was, although she had become it. The reason why she was "weird" was because she shared nothing and did not speak a word to people. Also no one knew what a triumph she felt when she said "no" or "yes". Unfortunately that was not enough for people. Especially not for the teacher. During art lesson she felt like going to the loo. She took a look at her watch and noticed that the class wasn't going to end any time soon. So she walked to the teacher and stood there. "Hello darling. What's the matter?" She didn't say anything and went back to her seat. Her bladder was filling up and she went to her teacher again ten minutes later. This time the teacher didn't say anything but just smiled shortly. Again, the girl went back to her seat. She was already feeling pain in her bladder, but didn't know what to do. Should she just walk out? No, the teacher would call after her. Finally she searched for some tissues in her bag and made sure no one was watching her and then put the tissues in her pants. She peed a little bit and then took the tissues out and threw them away. She was doing the same thing twice and suddenly someone was shouting "Miss Jarvis, Serena is doing something dirty!"