BBM
I believe it was the Wikipedia article I linked about the movie that said her marriage was destroyed or words to that effect. I've never read the book or seen the movie so I don't know how they presented it. The fact that her ex sent her supplies and supportive notes tells me their relationship was or became amicable.
I agree that it's quite possible Jenny had decided to move on. I believe it was verified that she did not board a flight to Cuba FWIW. Of course, moving on doesn't mean that something bad hasn't happened to her that JR doesn't know about. I certainly hope she is safe.
OT--Beware! Rant ahead--JMO, MOO--I had never seen the piece from Sugar/Cheryl's column. I just have to stand up and say that I think "Wanting to leave is enough" is extremely self-involved and potentially damaging advice. I really hope Jenny didn't follow it. Call me old fashioned. It's OK. I'm very proud and happy that as two children of divorce my husband and I will have the satisfaction and joy of celebrating 50 years of love and adventures in September. There are many times I've wanted to leave for no reason other than my own issues, but I honored my marriage vows/commitment. So has my husband. We are two very imperfect people with lots of baggage who married in college and who periodically strongly clash on certain issues large and small. But we love each other fiercely and vowed to do so in good or bad times, which we have done. It's possible we could have been better off with other partners or alone, but we chose not to find out.
All the "even thoughs" on that list are reasons we have stayed together and did not dispose of our mate. Was it messy and inconvenient at times? Sure. Life is messy and inconvenient. Was it joyful at times. Sure. Life is joyful. Was it boring at times? Sure. Life is boring. And life is not only about me, myself and I. Just "wanting to leave," when you have made a commitment to another human being, is NOT enough. "Earn" your leaving by trying your hardest to stay and make it work. You may be glad you did. We are!
I don't mean this rant as a criticism of anyone who has ended their marriage or relationship. I just feel the need to counteract this particular advice with my personal experience and opinion, in the hope that anyone who thinks "wanting to leave is enough" will give it some thought before leaving. I realize many will disagree with me and that's OK. I don't want to derail the thread.

End rant.
ETA--I didn't realize until reading a link about Sugar's advice that "Wanting to leave is enough" was written to her twenty-year-old self about breaking up with a college boyfriend. That's a quite different context than leaving a committed relationship, and in that case, I agree. But I do stand by my opinion that it's poor advice for anyone in a committed relationship who reads it as applying to everyone. JMO