Somebody help me I forgot the title. So our mc got isekai. She became the evil aunt of the...

Somebody help me I forgot the title. So our mc got isekai. She became the evil aunt of the protagonist. She suddenly became kind so the protag feels uncomfortable. Then the uncle suddenly visited which in the original story, should been a year later. He came to get his nephew but the protag didn't want to so he call his aunt his mom cause he didn't want to get seperated to his aunty. Iirc, the mc is white hair and purple eyes which is similar to a past royalty, and they kinda implied that she's related to the royalty.