Movies with interfering in-laws and kids are often presented as comic, the ridicule bringing welcome relief to beleaguered married folks suffering offscreen at the hands of relatives.
The story of a marriage was an excellent way to fulfill the goal of discussing class without discussing class, and to tell an audience that they were upwardly mobile.
Everyone will tell you how rigid I am, but a teacher has to be flexible. You can't cut the student to your cloth you have to cut yourself to theirs.
Another superb movie about a mature marriage grounded in a fundamental lack of communication is Dodsworth, based on the Sinclair Lewis novel.