Help me find this Manhwa

Hi everyone! I’m trying to find a manhwa I read. It was a full color manhwa that seemed to be loosely based on Cinderella, but the FL might not have been named Cinderella.

What I remember most clearly is one of the stepsisters she wasn’t evil, but super sweet, kind of chubby, with brown wavy hair and possibly green eyes. She was a recurring side character and had her own love interest tall blonde nobleman. I remember her exchanging letters with her love interest.

The scene that really stood out to me was when the nice stepsister gave the FL a framed painting of the FL with her biological mom as a gift.

Other detail : She still had a wicked step mom along side 1 slender wicked step sister and i think the mean step sister always had her hair in a bun i think