So the summary was about this girl got married to Mr. Gu as his stepsister had an accident (or didn't want to go or something). Turns out that the ML has some kind of personality disorder, and the blurb said something about him being jealous of his other personalities. It's probably a Chinese novel, hopefully without misunderstandings, r*ape or abuse.
Any other details? time period could help a lot, is it historical or modern? fantasy like or traditional? and what about "The Proud Sweet Wife: President Gu, Please Lend me a Kiss"?