Leveling My Husband to the Max is a Manga/Manhwa/Manhua in english language, Manhwa series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Because of her indifferent husband, Amber died alone. She regressed to the first night of her marriage…! In order to prevent a repeat of my past life, I’m trying to revive the impoverished duke and have a neat divorce with my husband... “Please treat me however you want, wife.” I’m flustered by my husband’s 180 degree change!