A Second Baby Is Coming — What About the First? The Complete Sibling Playbook

The hardest work of a second baby isn't newborn care — you already know that job. It's catching your firstborn as their world tilts. From their view, a stranger just moved in permanently and took half of you. This playbook turns the shock into a transition.

During pregnancy (2–3 months ahead is plenty)

• Time the news by age: under-threes can't grasp "in a few months" — waiting until the bump is obvious is fine
• Use their own baby album: connect "the new baby" to their history, not to a rival
• Complete big changes early: room moves, dummy weaning and potty training should finish 3 months before the due date — or wait until months after. Never let your firstborn equate loss with the baby's arrival
• Involve them: feeling kicks, choosing outfits, "reading" to the bump

The newborn weeks: three protective moves

1. The arrival gift: have "the baby" bring a present for the big sibling — first impressions shift instantly
2. Brief your visitors: greet the older child first, baby second. Tell friends and family in advance
3. Fifteen minutes of one-on-one daily: non-negotiable, sibling-free, and the older child picks the activity. Those 15 minutes outperform every lecture

Handling regression and jealousy

• Suddenly wanting the bottle, baby talk, wet pants — regression is a normal stress response. Playing along briefly ("you want to be my baby too? Come here!") works far better than "you're a big boy now"
• Never say "let the baby have it — you're older": that sentence breeds more resentment than it resolves
• Describe, don't referee: "you both want the truck" invites negotiation better than ruling on who grabbed first

On expecting maturity

They don't need to grow up overnight. Let them dislike the baby; let them say "send it back." A child whose feelings are received has the spare capacity to slowly grow sibling love.

The first-year goal isn't "loving each other" — it's "the firstborn is certain they haven't been replaced." Achieve that, and the rest tends to follow.