I just saw this again after many years. I had forgotten Karen was in it. Seeing her in the role of Sandy once again confirmed my belief that she is the most beautiful woman in the world. She takes my breath away every time I see her.
Karen Allen is a beautiful woman and a wonderful actress, but I feel her character was underwritten here and she basically disappears from this film fairly early. There were too many loose ends for me to appreciate this film fully, and her character was underdeveloped.
I think Sandy's character was developed enough. She told George, after he helped her son through a bad time in the middle of the night, that while she loved him she was someone who did not like being alone and that if it didn't work out between them she would find someone else. I thought that was a cold, hard statement and wondered why George stayed with her after that.