Girl Twins and Brother

Any mamas out there who had twins super close to their first child? My son will be about 15 months once his sisters are born, and I just want to make sure he won’t feel left out or anything like that. I want them all to grow up close and bind with each other. The twins are fraternal girls I’ve read things about not referring to the twins as “the twins” and. Just by their names so that way they have their own identities and that makes a lot of sense. As well as separating twins at times when they’re a little older and spending time with one twin alone and the other with the other siblings Anyone have experiences they’d like to share or tips?