Ustedes, los ricos

I just watched this film last night for the first time , and I really liked it. Great acting. Specially from The immortal Pedro Infante who gives a superb performance. This movie is a real tear jerker as you will see how he deals with the lost of his only child.

This movie is the second part of a trilogy that started a year before with Nosotros Los Pobres, and ended five years later with Pepe El Toro (which in my opinion is the best of the three).I never saw these movies in chronological order.The thing is that I first saw Pepe El Toro months ago and his wife and twins were dead. So I supposed they died somewhere/time in the first two films. But I was wrong it never happened.I wonder why all of a sudden they are all dead in Pepe El Toro without any explanation? Only his older son dies in Ustedes Los Ricos.At the end of that movie he is having dinner with his wife and newborn twins. Five years later they are all gone. For a moment I thought I was missing a movie between these two.I even thought Islas Marias was that missing movie (I haven't seen that one yet), but I found out it has nothing to do with this series.Can someone please explain this to me.?