Why did Lin meet Zhang Youyi on his deathbed?

Because Xu Zhimo met Lin in London, he fell in love at first sight and couldn't extricate himself. He was dissatisfied with the arranged marriage with Zhang Youyi's parents and didn't have much affection for Zhang Youyi. So he divorced Zhang Youyi. Lin may think that his meeting with Xu Zhimo is partly the reason why Zhang Youyi was abandoned. So I feel a little guilty about Zhang Youyi.