Semantic love triangle.
I thought that lidia's confession at the end that about Tommaso's care for her was very powerful. In several parts of the film Giovanni reveals a conflict with loving someone who is very intelligent and knowledgeable, yet mundane (obviously he was speaking of Lidia).
Both men loved her for her intellect, yet neither loved her carnally for her physical prowess. She shows obvious signs of frustration in this. Especially when she read aloud Giovanni's note from the past. She realizes here that at one point he did love her brain AND body. Does he come to this realization thus prompting the first on screen kiss between the two?
The above paragraph also relates to Giovanni's final confrontation with Valentina... she embodies intellect and yet is not banal like Jeanne.