Thanks to theBoss who highlighted about the ST article – "Fleeting nudity scene gets OK" which is also reported on Gamepolitics.com
I played through the game and this brief ‘revelation’ only appeared at the end of one cutscene with about 5 seconds of screentime. Before the expansion pack was released here, reports about it were already sprawling on the internet so the shock factor is kinda diminished. When I came across the cutscene, I had anticipated the moment so I took out my camera to get a shot.
Rockstar is known for always pushing something extraordinary in all their releases. The main GTAIV game had drunk driving as a minigame which was more interactive than just watching some cutscene.
Expect something else in their next GTA title "Chinatown Wars" scheduled to be out next month, on Nintendo DS.