Review by Quinoa1984

The director of this film wasn't an amateur, even as it was his first feature. The Sister-in-Law is made not by some inept slacker looking for a couple of bucks of loose change, but someone who does care a little about his craft. This doesn't exactly make it very good but it does show that there is something going on, that dramatically the film actually makes sense, has some decent acting (or from John Savage very good acting) and even some sexy sex scenes where it's required. It's a fairly simple story of two brothers caught up in hazardous circumstances: one, Savage, is having affairs with the the wife and eventually the mistress of the other brother who is, in fact, in very hot water over a drug deal he was supposed to act as courier for over to Canada.

It follows their trials and tribulations in these matters, and for the typical drive-in crowd (it comes with a pack of eight movies from Crown entertainment) there are some typical pleasures like skinny dipping at night or some (almost) wacky gangster violence. But in reality this is really a low-key drama played out on personal stakes and put to a musical track by Savage himself that isn't half-bad, unlike most exploitation scores that are either bad or just non-existent in the talent sense. There's even a banjo-plucking number done during a chase scene that rings as some fun. Comparatively, indeed, out of the eight movies assembled (others include Best Friends and The Stepmother), this is more than likely the best. It's conventional marital-cum-crime drama at a professional level.