An elderly man slipped quietly into Angelina Jolie‘s beach lodge — and within minutes she was sprawled naked in front of the 73-year-old.

Brad Pitt looked on with approval as the sandy-haired old-timer went to work. Acclaimed portrait artist Don Bachardy had flown all the way from Santa Monica to Namibia — determined to do justice to the world-class beauty as he drew erotic sketches of her in the final days of pregnancy.

“Angelina is big on documenting the high points of her life,” explained a source close to the actress.

“She has tattoos featuring the longitudes and latitudes of Cambodia and Ethiopia — the birthplaces of her adopted children Maddox and Zahara. And for her biological child with Brad, Angelina wanted paintings of herself through the various stages of her pregnancy as a special commemoration.

“Plus, she feels that the pregnant female form is especially beautiful. Brad couldn’t agree more.”

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