Shirley mclain was wife and she needed a body guard- what movie?

That sounds like the plot of the movie "The Last of Sheila" (1973).

In the film, Shirley MacLaine plays a wealthy socialite who invites a group of friends to a yacht party. Unbeknownst to them, she has also invited a mysterious bodyguard named "The Butler" who turns out to have a dark secret.

The movie is a complex whodunit with many twists and turns, and the bodyguard plays a crucial role in the unfolding mystery.