Definition
To engage in sexual relationships with others outside of your marriage or committed partnership.
對伴侶不忠
She found out that her husband stepped out on her by dating another woman.
她發現她的丈夫背著她和另一個女人約會。
In many stories, characters face moral dilemmas when they step out on their partners.
在許多故事中，角色們在背叛伴侶時面臨道德困境。
If you frequently step out on your marriage, you may hurt the ones you love.
如果你經常背叛婚姻，你可能會傷害你所愛的人。