Next To Heaven by James Frey

In this world of excess, best friends Devon and Belle have it all--beauty, money, status. But they want something more. Something dangerous. Something that makes them feel alive. Their solution? A party--a meticulously curated gathering of New Bethlehem's elite, from a desperate ex-NFL quarterback to a hockey coach with a penchant for married women, and a ruthless Wall Street "closer" who wields his wealth like a weapon. 

One night. An ultra-elite swingers party. Multiple betrayals. And a murder that will shatter New Bethlehem's carefully constructed facade. 

Enter a world of troubled opulence and sharp betrayal that's reminiscent of "The White Lotus," "Your Friends and Neighbors," and "Big Little Lies"--a world of spectacularly badly-behaved rich people where money can buy anything. . .until it ruins everything.