I always have joked that Amos has a thing for attempting to woo royalty with a shocking success rate but it's more a numbers game since he attempts to woo most kats he finds a fancy to but it doesn't matter to him if they have a title X3 And he only remarks on the ones that took him up on the offer... But that does lead some to worry about when he claims to have known Queen Delilah Collate, the thought that he might have brought about her end by sleeping her while married to King Copernoz but Amos assures us all he has only known Della as a ghost...
She quite enjoys the freedom with being a ghost to the point she purposefully delays her unfinished business so she can explore what she could not in life.