母系亲戚

例句：

1. 1. She is related to her mother's side of the family.
   她和她母亲的家族有关系。
2. 2. The term "mother's side" refers to the side of a person's family that the mother is from.
   “母亲那边”指的是一个人的母亲来自的家庭这边。
3. 3. In some cultures, it is considered impolite to refer to someone's mother as their mother's side.
   在某些文化中，把某人的母亲称为他们的母亲那边被认为是不礼貌的。