At school, after the incident of Jefford and Martha.
Ella should be able to get a thank you from her cousin because she managed to save Jefford from the punishment, and sanctions that will be given by the teacher.
Martha was proven to have deliberately pranked Jefford. In the school cafeteria at that time. But considering her good and proud achievements, Martha was only given a verbal warning. And she also had to apologize in writing to Jefford.
That afternoon, in the school cafeteria, Jefford was enjoying his lunch quietly. Don't know since when Arthur became attached to him? Whether it was because Jefford asked for, or because Arthur didn't want to be separated from Jefford?
Maybe because in the end, Arthur found out that Jefford and Ella had a sibling bond, and then he was the only one who knew apart from Ella and Jefford themselves.