This Concubine in Time Travel Is Unusual

Others' time-travel was accidental, but her time-travel seemed to come with a mission. Coming to this strange dynasty in different time and space, she became the most unpopular concubine in the house of the eighth prince who was the most unpopular in the current dynasty. Was it destined by God that she must become his stepping stone and push him to the throne in order to successfully return to modern times?