Who is Mrs. Rhone from Something Blue and what is their importance?

Mrs. Rhone is Darcy's mother. On the day of her beautiful daughter's birth, Mrs. Rhone knows Darcy is meant for finer things. Mrs. Rhone meticulously curls Darcy's chocolate brown hair daily, setting her daughter apart from the other little girls with their haphazard locks. She is rewarded for her efforts when Darcy gets engaged to Dexter Thaler, a handsome law school graduate from a good family.