I'm a fan too! I thought you named your pup after Suki in the show. There is a member here that has a Rory and a Lane.
Did you meet the breeder? They would be the ones to ask the pedigree questions. Humping isn't necessarily a sign of sexual maturity. It is a dominance thing, or a stress/anxiety reliever, believe it or not. If the Pom is only 3 months old I wouldn't worry to much about them getting together to mate quite yet. They're still babies.