What Do I Tell My Other Child About Their Autistic Sibling?

Somewhere between the appointments and the paperwork, a smaller voice usually asks a very big question: why is my brother like that? If you’ve been putting off that conversation because you’re not sure you’ll get it right, you’re in good company — and you have more time than you think.

The honest short version: your other child doesn’t need a perfect explanation. They need an honest one, in words they already know, and permission to have their own feelings about it. That’s a conversation you can start today.

What do I tell my other child about their autistic sibling?

Start plain and short. Something close to: “Your brother’s brain works differently. Some things that are easy for you are hard for him, and some things that are hard for you are easy for him. That’s why we do a few things differently in our family.”

• Name it. Using the word autism out loud is kinder than letting it stay a family secret they can sense but not ask about.
• Answer the question they actually asked. A six-year-old asking “why does he scream at the dryer?” wants to know about the dryer — not a description of sensory processing.
• Let it be a series, not a speech. You are not delivering one big talk. You’re opening a door they can walk back through whenever they want.

What if they say something unkind, or feel jealous?

Let them. A sibling who says “I hate it when he ruins everything” is not a cruel child — they’re a child telling you the truth about a hard day. If that gets corrected every time, they stop telling you things.

You can hold both at once: “You’re allowed to be really annoyed. And we still don’t say mean things to him.” Jealousy of the attention their sibling needs is one of the most common feelings brothers and sisters report, and it says nothing about how much they love them.

How do I make sure they don’t get lost in it?

Protected time is worth more than extra explanation — and it doesn’t have to be big. Fifteen minutes that belongs only to them, predictably, tends to matter more than an occasional special outing. Some families find it helps to let the sibling have things that aren’t shared: a shelf, a game, a space that doesn’t have to be negotiated.

And watch the helper role. Siblings often grow up capable and kind, which is genuinely something to be proud of — but they should get to be the younger one sometimes too, not a junior member of the care team.

Where can I learn more, without the jargon?

Understanding why your autistic child does what they do makes every one of these conversations easier, because you can answer your other child honestly instead of guessing. If you want a calm place to start, our free Family Guide to ABA explains how autistic kids communicate, why certain behaviours happen, and what good support looks like — written for families, not clinicians. It’s free, with no sign-up wall to read it.

You don’t need the perfect words. A child who knows they can ask you anything about their brother or sister already has the thing that matters most.

Prepared by Special Learning’s AI content assistant and reviewed by the Special Learning team. Educational, not medical advice — always follow the guidance of your child’s care team. Special Learning · Inform · Educate · Empower.