Father of 3 children turns out to have been infertile all his life.

The realization

Richard couldn’t speak for the rest of the doctor’s visit. The truth had hit very hard. A movie of his life was playing in his head. He tried to recall all the details of each memory he had. During his search for signals and alarm bells, he did find a few. 

This couldn’t be true, could it? Had Kate been lying to him all these years?