The thing with Co housing is people seem to think they are getting along, being cute and following each other around and cuddling up, they're actually competing for the best place to be. I wouldn't do it with 2 balls never mind a ball and a boa. Best advice I can give you on this is to try get something sorted for the royal asap, they're not social animals and it can lead to a lot of stress which again might not be picked up on because they don't have a way of telling you like say a dog can.