Yeah that scene stayed with me for years and would love to know what movie it was ... i was a kid when i watched it and thought it was terrible thing to do and never forgot since then.

Things i remember ...

- Wife/partner is having sex with someone during her disabled partner/husband is watching and not being able to do anything but you can tell he is very upset . He is totally crippled in a wheelchair.

- It is definitely more than 7+ years old minimum / In colour (Could be much older)

- Could be subtitled / foreign movie

- The main characters seem to have lots of money or part of the royalty – May live in a mansion large house.

- There was some type of staircase in the house