I only remmeber part of it. It was a line from the movie.

'she is older than she looks'

'but you are her mother!"

'NO! i am her daughter!"

I remmeber that it's a black and white movie from way back if that helps any?

The Twilight Zone (TV anthology series), "Queen of the Nile"
Starring Ann Blythe (the eternally youthful actress), Celia Lovsky (as her aged daughter), Lee Phillips
Wikipedia synopsis:
Columnist Jordan Herrick prepares to interview famed actress Pamela Morris. She is known for her vitality and beauty, and many want to know her secret to staying young and beautiful. Herrick is welcomed to Morris's sprawling manor by a very aged woman named Viola. He naturally assumes that this is Morris's mother, and greets her as such; he is shocked when Viola later confides that she is in fact Pamela's daughter. Herrick takes this as a sign of senility and greets Pamela when she comes down the stairs. The two flirt and have drinks, and Herrick obviously is smitten.
You can read the rest of the summary here though it's incomplete, leaving out Herrick and another man's exploration into Pamela's past and noting her resemblance to an actress in Silent films.
http://en.wikipedia.org/wiki/Queen_of_the_Nile_(The_Twilight_Zone)

Here's Part 1 on YouTube:
Queen Of The Nile 1-3 - YouTube (http://www.youtube.com/watch?v=1c2911fgXyg)