受宠若惊（受寵若驚）　

◎ 受宠若惊 shòuchǒng-ruòjīng

[feel extremely flattered;be surprised at the unexpected honour;receive favour with awed excitement] 因受到过分的宠爱而感到意外的惊喜和不安(多含贬义)

过道台承中丞这一番优待,不禁受宠若惊,坐立不稳,不知如何是好。——《官场现形记》