I found this clip on another site- a mother in law raping her son in law while who I assume is the wife, looks on.. Just wondering if this is Reiko Yamaguchi or not, and the movie this is from. I have included the URL below and a snapshot- the segment I am referring to starts about 5:40 in. It's dark, but I hope someone can identify the actress and the movie it is from. Thanks.
https://motherless.com/287023D
https://motherless.com/287023D