I gave up on My Wife's Lover at the 50-minute mark (it's 88 minutes in total), after watching what seemed like an aggregate of 30-35 minutes of soft-core porn (in other words, about 70% of the film footage I had seen up to that point). I want my $3.00 (Canadian) rental fee back.
Director Kevin Chu seems to pretend that this is glossy high art. It ain't. There is a story in there somewhere, but the unending bed-hopping wouldn't let me find it. Ultimately, it doesn't matter anyway -- Chu is not out to spin a yarn, but to titillate (over & over & over again).
We've seen most of this simulated stuff many times before (they used to be called 'blue movies' 20-25 years ago). It's all very boring because there's no 'breathing room'. Some dialogue appears for a few minutes and zoom, it's into the sack and all that rehearsed heavy breathing.
Soft-core porn only works if it's done sparingly. Director Chu SATURATES his frames with it. This might appeal to viewers who are 99% fueled by testosterone and perhaps 16 years old.
The flick (can't call this a 'film') is annoying in another respect: it has English sub-titles, but it's dubbed into Mandarin from its original Cantonese. The dialogue is poorly synchronized -- it's so bad, in fact, that you don't have to be a Mandarin or Cantonese speaker to notice it.
My Wife's Lover was made in 1992, and released on DVD 11 years later, in 2003. After watching a little more than half of it, I can understand why.