Nikita - Sexy Killer (1996)

Lengthy opening has a drunken Sarah, with four of her mates, invading a rich couple's home. They have group sex downstairs (endlessly), with Sarah doing her patented d.p. thing, and then head for the safe to steal the goodies.

When they're confronted by the master of the house, we learn that it's an inside job, led by young Mark (Francesco Malcom, young star of ADOLESCENZA/ALL GROWN UP), the owner's son, who has the combination to the safe. A shootout ensues, followed by an even more lethal gun battle with the arriving police, and everyone but Sarah is killed...