金屋藏嬌 [－－－娇]

Jyutping gam1 uk1 cong4 giu1
Pinyin jīn wū cáng jiāo

Definitions (CC-CEDICT)
  1. a golden house to keep one's mistress (idiom); a magnificent house built for a beloved woman
Definitions (Wiktionary)
  1. phrase, idiomatic
    to take a concubine or wife.
  2. phrase, idiomatic
    to keep a mistress in a tucked away in a luxurious house or apartment.