"That Dangerous Age" is the only non-American movie Myrna Loy appeared in...at least that's what IMDB says about this one. And, I am actually glad she made this film abroad, as its plot about infidelity is one Hollywood would have avoided...particularly with Loy.
When the story begins, Sir Brian Brooke (Roger Livesy) is in court arguing a case. However, unexpectedly he faints and a doctor is rushed to his side. Soon the wife (Loy) receives the news...exhaustion from overwork is killing Sir Brian and he's been temporarily blinded! He must have six months complete rest...no work at all and no stress. During this time, his wife does everything for him in their retreat in Italy. Out of the blue, the couple receives a poison pen letter accusing the wife of adultery. At first, Sir Brian is accusatory but quickly apologizes...as he knows his good wife must be faithful and the letter a lie. However, after assuring him it was a lie, you learn that she was having an affair...and who would blame her considering what a neglectful and cold man Sir Brian had been. To placate him, she convinces Sir Brian that his assistant has NOT been having an affair with her since he's actually in love with his daughter (her step-daughter), Monica (Peggy Cummins). To help cover this up, the wife convinces her lover to court Monica...and soon the pair are in love!
Sounds complicated, huh? Of course. But it's also an adult look at infidelity and presents an interesting scenario where you have trouble hating the wife. You understand her unmet needs and the film gives you a lot to think about and consider. Well made and well worth seeing.