Brooks Nader Goes Topless In Front of Parents and Sister in Italy

Brooks Nader was totally topless in Sardinia ... an interesting choice, considering she was with her parents and sister.

TMZ obtained photos and videos of Brooks' topless family outing ... and her relatives didn't look fazed that her girls were staring them in the face ... not even when she jumped off the boat into the water.

The Sports Illustrated stunner and "Baywatch" reboot star wasn't fully nude -- she barely covered up with a lacy bottom -- but it's still striking to see a topless Brooks next to mom, dad and sis.

The quick dip went down after Brooks, her parents and Sarah Jane enjoyed a fancy lunch at La Scogliera in La Maddalena.

Brooks stunned at the swanky spot, donning a floor-length white dress that showed off her fab figure. So, yes, she owns a top.