I Don't Trust My Twin Sister
i read spoilers for this. DO NOT READ SPOILERS. Spoilers: There is a twist and honestly it's a good twist but at the same time I was like WTF. So Complicated. They could've had the greatest sister-sibling relationship and because of their grandfather/parents that fell through as time went by. Il-Sister was never sick and did that for her sister (no favorite twin). The FM is the unfavored twin; the other twin was a genius and got all the spotlight. Feeling bad for her twin sister, she pretended to be sick and thus became very lonely and had nobody to care for her. She then became resentful and tried burning the house, stealing her sister's fiancé, and bankrupting her family. Then FL travels back in time to undo everything (but doesn't realize that she has amnesia and its gets complicated, she's the "weak twin." )
Her Merry Obsession