a sexual relationship between two people in which at least one of them is already committed to someone else
不倫
a relationship formed between people or groups based on mutual experiences, ideas, feelings, etc.
絆
a large family group consisting of parents and children that might also include grandparents, aunts, or uncles
大家族
a person who takes someone else's child and raises them without legally becoming their parent
養親
either of two children or animals born from the same mother at the same time who are very similar in appearance
一卵性双生児
the woman that is married to one's parent but is not one's biological mother
義理の母
the daughter of one's stepfather or stepmother from a previous relationship
義理の妹
the state in which a couple decide to live apart while they are still legally married
法的別居
the act or fact of taking someone's child and growing them up, which has been approved by law
養子縁組
showing a level of love or care that one would only expect a brother to have
兄弟の
(of a group of people) having a strong friendly relationship with shared interests
密接に結びついた
to have a secret romantic or sexual relationship with someone other than one's own partner
浮気する
to remain loyal to or supportive of someone, particularly during a hard time
支える
to look or act like an older member of the family, especially one's parents
に似ている