If you are worried about what the prince will do, don't be. He just wants Ellen to marry into the royal family to reconnect the royal family to the spirits, but he doesn't know the TRUE extent of what drew the spirits ire and got them cursed. His schemes get btfo by Ellen every time, and he eventually realizes there is a 0% his plans will work and lets go. His sons do fall in love with Ellen at first sight and Ellen REBUFFS them with full force. She eventually tells the prince EXACTLY why she'll never be in a relationship with him.