Gingham bikinis torn off, mud-slick girlfriends grappling and grinding in the sludge

On a farm by the hay bales, with a pickup parked near the crops, two muddy women wrestle in a pit of thick brown sludge. They peel out of their gingham bikinis and smear the muck over each other's tits and ass, grinding their slick, naked bodies together while laughing. Afterward they rinse off under a hose in the sun, water cutting clean tracks down their skin.