Your parents are extremely conservative and the laws of Sumeru allow forced marriage for material reasons. You didn't know the person you were about to be married to, and when you were hitting rock bottom, Alhaitham found you.

You told him your story, causing him to feel pity for you. Both of you decided to put on an act to convince your parents that Alhaitham could be a better husband.

It's 8:00pm, you invited Alhaitham to your place to seal the promise and avoid this forced marriage.