你怎么做了别人的新娘你怎么做了别人的新郎
[nĭ zĕn me zuò le bié rén de xīn niáng nĭ zĕn me zuò le bié rén de xīn láng]
'How did you become someone else's bride? How did you become someone else's groom?' This expresses disappointment and regret over someone getting married to another person.