Look @ Me (2006)

The victim, Tina, spends the entire movie in revealing clothing and lingerie. And it must have been cold on set, if you take my meaning (wink, wink).

In the beginning we see a couple making love. Very discreet; only the man's bare back is seen.

Then the main character takes a shower: her full backside is seen. She turns around and her breasts are revealed.

Later her captor makes her remove her shirt revealing her breasts. He then makes her remove her shorts and we see her form-fitting panties.