2 sentences

1. 他们两家有着复杂的姻亲瓜葛。

   tā​men liǎng jiā yǒu zhe fù​zá de yīn​qīn guā​gé.

   The two families have complicated connections through marriage.

   Source: Dong Chinese Dictionary

2. 我太太的所有亲戚都是我的姻亲。

   wǒ tài​tai de suǒ​yǒu qīn​qi dōu shì wǒ de yīn​qīn.

   All of my wife's relatives are my in-laws.

   Source: Tatoeba