Maybe because she still thought that she had the chance to become Cinderella here, after all, her mind still didn't grasp[ the point that today may be her last day of lavish life she was living despite being only a mere maid.
After all, she knows how to play with men and extort money from them, and now she just wanted to live her life luxuriously, didn't want to find any other rich men because she felt she just had to rein one rich man and her rest of the life will be happy forever.
This is what she thought and also because of that she agreed even though she knew about the risk of her getting caught, and today it already happened.
Regret,
She is feeling now.
But what can she do?
After all, in this world, there is no medicine for regret.
After choosing a path either you follow that path or will abandon that path, because no matter what and which path you choose, right or wrong.