I think chapter 60 covers chapter 130 of the novel. The divorce is 164ish. So maybe 10-15 more chapters. Things do pick up on the next couple of chapters though if you want to come back on the train.
Chapter 48 covers chapter 102 of the novel. The divorce happens in chapter 164. It would be 30 more chapters until the divorce, but about 12 chapters to be in the centre of the main events leading to the divorce. Though, there's a couple character building moments that could be skipped without...