関係を

a relationship; a connection between two people or parties (as the object of an action)

→ 関係
phrase Uncommon #19,399
a relationship; a connection between two people or parties (as the object of an action) 関係 means a relationship or mutual connection, and を marks it as the object of the verb.
JA: それは私たちの関係を終わらせたいということですか。
EN: Does that mean you want to end our relationship?

それは私たちの関係を終わらせたいということですか。

Does that mean you want to end our relationship?

それは我々の関係を終わらせたいということですか。

Does that mean you want to end our relationship?

他人の関係を知るのは君には難しいだろう

It would probably be difficult for you to understand other people’s relationships.

— オッペンハイマー (2023)