I think Fumiko may have learned that there is such a person as Kikuji, who has the same experience as herself, and although she has not seen him, she has slowly fallen in love with him. Because of his mother's deep sins, he has been begging Kikuji to forgive his mother. Perhaps so, Wenzi can face his feelings. However, Fumiko said that her mother's death was a rejection of all forgiveness, does it mean that Fumiko feels hopeless about this feeling?
On the first phone call, at this time, Wenzi lived alone, was lonely and thin. Maybe it's because his mother died, or maybe it's because he knew that Kikuji would marry Yukiko, so he chose to sell the yard and leave, falling into the predicament of no home and no job.
On the second phone call, Fumiko, who was staying at a friend's house, was hesitant and afraid of thunder. I haven't decided whether to contact Kikuji yet. When I learned that Kikuji also wanted to sell his house and did not have the heart to get married, his mood should be bright and happy.
On the third phone call, Fumiko rented a house and looked for a job, was proactive, and sent a letter. In addition to asking for forgiveness from my mother, I should have expressed my love. So in the meeting with Kikuji, she tore up the letter and did not let Kikuji see the contents.
Fumiko's love is intense and sad. He did not let go of the guilt brought by his mother, and fell into the uneasiness of "there will be better Shino Tao". Maybe I once compared myself to that barrel tea bowl. After all, I understood that it was a longing, and finally chose to leave.

Fumiko said, "No matter how ugly or dirty I may think about this in the future, I can't forget you."