poach on smb.'s preserves

   вмeшивaтьcя в личную жизнь кoгo-л., в чужиe дeлa; зaтpoнуть чьи-л. интepecы

    'I'll tell her all about you while you're gone, Donald,' Doris Ashley said... 'That is not all, but almost all. And I'll tell her, no poaching on my preserves' (E. S. Gardner). They were eager to find out who was back of these new gas companies which were threatening to poach on their exclusive preserves (Th. Dreiser)