All her life, her sister fulfilled many roles for her — big sister, mother, father — and OP thought it felt right that those multiple roles would be honored on one of the biggest days of her life.
Her sister said she didn’t mind being the MOH and didn’t want to turn my happy day into something stressful. OP doesn’t want to concede to her fiancé or parents.
One Redditor suggested that her father-in-law walk the groom down the aisle and stay with him at the front of the church while the sister walked the OP down the aisle.
And this Redditor added, “Or….the fiancé can get off his high horse and understand that his bride gets to choose who walks her down the aisle, and the in-laws get no opinion here.”