Final answer:
The student is writing a letter to their mother about their friend's visit over the weekend.
Step-by-step explanation:
In this letter, the student is writing to their mother about their friend's visit over the weekend. They mention that their mother wants their friend to come home again, even if something terrible happened. The student expresses that they miss their friend and would rather see them than do anything else. They request the mother to find the friend and ask her to come back. The letter ends with the student saying thank you on behalf of their mother.