yurr's feed

ngl i dont really understand some of the politics in the story lmaoo like i read really carefully but im still confused over why hed be in trouble if his aunt gave birth to a son. or wait is his "aunt" his step mom..? and why would the prince (ml) be in trouble too like arent they the emperors in the country or whatever? or does mc also come from a family of the same level of royalty? hopefully i get it as i go