Pls help find this movie..

Hi All,

Please help find this little gem.. I saw it during pandemic outbreak 2019-20. It’s from late 90s or 2000-2008 and surely under-rated one. I don’t recall any actor who starred but it had few twists and turns with some hot stuff.. It was either a Hollywood or a British production. It’s a dark comic, thriller around cheating husband who goes underground and pretends killed/murdered for insurance money. In the climax, the two leading ladies kill him and together bury him in a pond/lake.. That’s how it ends. Thank you