I've been trying to find the name of a movie for some time with no results as I don't know the title I hope you can help
Briefly the story is of pair of lovers who spend only one week together every year in the same hotel although they are each married to other people.
On the death of the woman her son finds evidence of the affair and goes looking for clues he meets up with the daughter of the other party and together they unravel the story although at first they are hostile the adventure brings them together.
It's a bit sketchy and I may have the relationships mixed up a bit please put me uot of my misery
plainsusieq

It's called "Same Time Next Year" with Alan Alda and Ellen Burstyn.

Same Time, Next Year (1978)

Hi Guys
Not the one I was looking for but I watched "Sme time next year" and enjoyed it
I will keep looking for the one I want thanks for that
plainsusieq

Apparently there may have been an alternate ending for this movie. You can check out the discussion here: IMDb :: Boards :: Same Time, Next Year (1978) :: Alternate Ending I Saw Years Ago. It sounds similar to your description of one of them dying.

The key to this film is the children left behind, who find evidence of their respective parents yearly affair (same room each time) and how the story unfolds I can't remember who was in the film but I saw it some years ago
Thanks for your suggestions though I appreciate it
plainsusieq