Twins Sam and Amanda Marchant secretly swapped roles in a kinky sex game to see

Shuddering

"Once they fell out over Amanda not paying her share for a taxi," Lee added. "Sam accused her of being tight, then Amanda knocked a kebab out of her sister's hand.

"Rich and I watched as they tore lumps out of each other, screaming and scratching. We had to wade in and prise them apart.

"Sam was definitely the more aggressive and moody.