Rebecca De Mornay in one of her more obscure films, Wicked Ways (1999)
I think this was her final nude scene, some 16 years after her breakthrough in Risky Business. She turned 23 during the filming of Risky Business, and was approaching 40 during the filming of Wicked Ways.
She still looks pretty good when she pops up on TV from time to time, so this may shock you: she turns 60 this summer!