a sexual relationship between two people in which at least one of them is already committed to someone else
婚外情
a relationship formed between people or groups based on mutual experiences, ideas, feelings, etc.
纽带
a large family group consisting of parents and children that might also include grandparents, aunts, or uncles
大家庭
a person who takes someone else's child and raises them without legally becoming their parent
寄养父母
either of two children or animals born from the same mother at the same time who are very similar in appearance
同卵双胞胎
the state in which a couple decide to live apart while they are still legally married
法律分居
the act or fact of taking someone's child and growing them up, which has been approved by law
收养
(of a group of people) having a strong friendly relationship with shared interests
紧密团结的
to have a secret romantic or sexual relationship with someone other than one's own partner
背叛