Karen Bell met victim - who can not be named - on dating site Plenty of Fish . Pair met up and acted out fantasy in which she spanked him with trainers . 42-year-old then claimed son had filmed entire session and demanded £25 . A man has been arrested after he was caught filming a woman having sex at the wheel of his car while driving along a busy road near London.
Karen Bell met victim - who can not be named - on dating site Plenty of Fish . Pair met up and acted out fantasy in which she spanked him with trainers . 42-year-old then claimed son had filmed entire session and demanded £25 . Threatened to post video online unless victim paid cash which rose to £55 .