The Last of Sheila (1973)

 

Directed by Herbert Ross. Richard Benjamin, Dyan Cannon, James Coburn, Joan Hackett, James Mason. 

https://en.wikipedia.org/wiki/The_Last_of_Sheila

https://www.rogerebert.com/reviews/the-last-of-sheila-1973

https://www.latimes.com/entertainment-arts/movies/story/2020-01-24/dyan-cannon-and-richard-benjamin-fondly-look-back-at-the-last-of-sheila

https://www.dvdtalk.com/dvdsavant/s1185last.html

https://www.tcm.com/tcmdb/title/22057/the-last-of-sheila#articles-reviews?articleId=362729