A new baby reorganizes the whole family overnight, but only one member of it actually chose that — and it wasn't your older child. Regression (baby talk, wanting a bottle again, potty accidents after months of being trained), clinginess, or sudden aggression toward the baby are all extremely common responses, not signs something's wrong with your child.
Why this reaction is so common
From an older sibling's point of view, a new baby means less of your time, less of your lap, and a lot of adult attention flowing toward someone who does nothing but cry and get held. Regressing to babyish behavior is often, in effect, a direct (if unconscious) request: "that gets attention — I want some too."
Before and right after the baby arrives
- Give them a real role, not a fake one: "helper" jobs that are genuinely useful (picking an outfit, singing during a diaper change) build ownership instead of just being told to "be a big kid now."
- Protect a small block of one-on-one time, even 10–15 minutes most days, that's just theirs — not shared with the baby, not interrupted by the baby.
- Let regression happen without a fight: if they want a bottle or to be carried, a short "sure, you can be my baby for a few minutes too" usually resolves it faster than refusing.
- Narrate the baby's boringness honestly: "Babies are pretty boring right now — they mostly eat and sleep. It'll be more fun to play with them in a few months." This validates rather than dismisses their disappointment.
When it turns into aggression toward the baby
Occasional rough handling (a hard pat, wanting to "hold" too tightly) is common and manageable — never leave a young child unsupervised with an infant, and treat it as a skills issue, not malice.
- Redirect the impulse to a safe target: a doll they can "take care of" the same way you take care of the baby.
- Name the feeling behind the behavior: "You're mad the baby gets so much of my time. That's a real feeling. Hurting the baby isn't okay, but being mad is."
- Give them a version of what the baby gets: being held, sung to, or rocked themselves — the physical closeness itself is often what they're really after.
This adjustment period is usually measured in weeks and months, not days, and it fades faster when the older child's feelings are treated as valid rather than something to shut down. The relationship you're protecting here — between siblings who'll know each other longer than they'll know almost anyone else — is well worth the extra patience right now.