"You are a husband and a wife."
Translation:Ви чоловік і дружина.
Ти is informal singular! Like tu in French. This sentence is about two people, so you have to use plural form - ви
Awh, I knew that ти is informal singular, I just thought is was a weird sentence and that it was about one person that was a husband and a wife at the same time ;p Thanks for clarifying.