This was her best nude scene, in a movie called Circle of Two. (1981) She was showing her stuff to an aged Richard Burton, who told her to get dressed.
(So you KNOW he was a talented actor, because that horny bastard seldom passed up a chance like this in real life. She was 17 at the time. Burton was 55 and looked older.)
The entire movie is on Youtube (below)
If you click on this, it goes directly to the nude scene, but you can always go back to the start if you want to watch the entire crappy movie.