A 90s drama

I am new to the group and hoping someone can help me with a title to a movie that I watched one time in the 90s. I have been looking for many many years to find it again to no avail. ((From what I remember)) it is about a man that has a wife that is terminally ill unless she gets a donor. He has an affair with a woman whom is a possible donor for his wife. That is about all I can remember aside from one random scene where the wife is very sick and he is methodically massaging her back in a karate chop motion to give her some relief.