Fun: Can Be Dangerous Sometimes (2005)

A trio of thrill-seeking, ennui-ridden housewives plot and scheme to indulge in a torrid game of "husband-swapping" on a beach vacation. Unsurprisingly, the husbands each concur When the couples return to the city, horrid violence begins to plague Raj and Megha. Naturally, one is the foremost suspect - though it remains unclear if he is guilty, or if someone else bears responsibility.