The marital discord of both Soames and his sister Winifred is the subject of the second novel. They take steps to divorce their spouses, Irene, and Montague Dartie respectively. However, while Soames tells his sister to brave the consequences of going to court, he is not willing to go through a divorce himself. Instead he stalks and hounds Irene, following her abroad, and asking her to have his child, which is his father's wish. (From Wikipedia)
ames was looking so well, hardly a day older than he did when dear Ann died, and they were all there together, dear Jolyon, and dear Swithin, and dear Roger. She paused and caught the tear which had climbed the pout on her right cheek. Did he--did he ever hear anything of Irene nowadays? Aunt Hester visibly interposed her shoulder. Really, Juley was always saying something! The smile left Soames' face, and he put his cup down. Here was his subject broached for him, and for all his desire to expand, he could not take advantage.
Aunt Juley went on rather hastily:
"They say dear Jolyon first left her that fifteen thousand out and out; then of course he saw it would not be right, and made it for her life only."
Had Soames heard that?
"Your cousin Jolyon is a widower now. He is her trustee; you knew that, of course?"
Soames shook his head. He did know, but wished to show no interest. Young Jolyon and he had not met since the day of Bosinney's death.