Русско-английский словарь пословиц и поговорок
В ЛЮДЯХ АНГЕЛ, А ДОМА ЧЕРТ
The person is very nice when in public, but is unbearable at home
Var.:В людях - ангел, не жена, дома с мужем - сатана
Cf:An angel on the street, a devil at home (Am.). A saint abroad, a devil at home (Br.). Saint abroad and devil at home (Am)