This flick was screened in 16mm at the Gene Siskel Film Center in 2016 as part of a "British noir" series; associate director of programming Martin Rubin wrote in the center's monthly gazette that this was an "undiscovered gem" that "combines taut suspense with a sensitive treatment of a delicate subject." I agree with that assessment.
This film also won me over by getting to the juicy bits, fast; the pacing is nice and quick, so that the pervy Mr. Oldberry does his sick deed (off screen, of course), and the Carter family is left to grapple with the consequences. The Canadian-set film is written superbly for a 1960 "issues" film with a schlocky title; it seamlessly morphs from domestic drama to legal procedural to suspenseful thriller in the final act.
A movie like this could have easily gone the way of unintended farce, but its well-rounded characters and willingness to look at all sides of the issue mostly keep it floating above the realm of silliness.
The audience at the showing I was in gave a couple chuckles in the beginning, when the film opened with a title card warning us that this story could potentially take place in any town, at any time; those sniggers subsided when the film proved its nuance during the rest of its 80-minute runtime. A great, underseen gem.