@SirTapTap it's still very early so don't worry! Continue exchanging smells, going very slowly, and keeping them separated for now to avoid fights. Then, it's on to creating shared positive experiences, like playing with them while they're in the same room (one person with Parker, one person with the kittens), so they get used to sharing space, without them focusing on each other and creating tension. Has Parker ever lived with other cats?