jigsaw family

(名詞) 拼圖家庭家 - 裡有兩組或多組父母親前段婚姻所生之子女的家庭。

Linking-up the finances of complex, interlinked jigsaw families is difficult work — and more often than not the CSA struggled.
—Tom Clark, "Welfare reform bill live blog: government suffers sixth defeat," The Guardian, January 25, 2012

William Higham, founder of consumer trends company Next Big Thing, said the rise of 'jigsaw families' meant that escaping for a break is no longer just about mum, dad and two children.
—Sebastian Lander, "Travel industry must cater for modern 'jigsaw families', says expert, as single parents seek better deals on holidays," Daily Mail, October 11, 2012