Princess Long Nose is part of an archetype for the imposter bride. In these stories, the false bride gives the real bride access to the groom through tricky over material goods. This indicates that the false bride does not truly love the Prince and only wants him for specific status or wealth reasons.  

Jokes aside, with the previous Christian imagery, then purifying your sins with water is an obvious motif here. Although the story wants us to believe she has cleansed her sin of curiosity, it is hard to understand why she needs to. Her curiosity caused her to find the Prince and break his curse on their terms instead of the stepmothers. Her punishment was losing her husband after being ‘disobedient’ to him and his advice. However, the story seems more nuanced than simply moralizing on a wife’s duty and obedience. She creates a support network for herself and uses it to quest for her husband!