Sorry for the very very late reply, I can't believe you answered me and I feel honored by it.
Anywho, I think you could write about him going into a library of some sort or maybe a secret pond garden and giving him back the necklace and follow any request he asks that is not going to let him go back. King dude will let him do whatever he wanted but still cannot escape or help Red escape and cannot hide somewhere he will not be found. Slowly Lucas can get to know the place but he misses home and sulks at the special place. King would sometimes pass and see angel and feel bad for him. Red will try to convince Lucas to go escape and after persistence he gives in and do intense research about the place and fails at the first attempt. The King heard what was happen and gets angry but before he could hit him he realizes how skinny, pale, and unhealthy the angel looks. He sighs and says to never do it again and also bring to attention that because he had sex he cannot be welcomed back because of the purity being broken or something. Before this happens and when The Angel stops crying at the special place Lucas is being romanticized by the king like little gifts and cuddling at night even if it was uncomfortable at first.