有一个可能性，两家人互换partner 重组家庭，参考美国歌手Shania Twain

Shania Twain is opening up about the heartbreak she endured after her divorce. The "You're Still The One" singer and Robert "Mutt" Lange ended their marriage in 2008 after 14 years, when Twain learned of Lange's affair with her close friend Marie-Anne Thiébaud
After finalizing her divorce in 2010, Twain and Marie-Anne's husband, former Nestlé execFrédéric Thiébaud, commiserated over their shared heartbreak and married on New Year's Day 2011.
互换更合适，见证奇迹