What happens next?

How to ignore your sister or brother 
Establish why you want to ignore your sibling. 
There are many different reasons you may want to ignore your brother or sister. 
If you're simply busy and need to focus, be sure to explain that to your sibling and make it clear you aren't ignoring your sibling out of anger.

pick from the following. -- If your sibling is doing something annoying, first ask your sibling to stop. If your sibling has done something seriously wrong to you, try to first resolve the conflict.; -- Your sibling will be much more likely to misbehave if they see why the comment bothers you so much. If you're simply adding to the buffer by letting your brother or sister know your reasons, it shows your sibling won't be too hard to react.; -- It can be tempting to ignore a sibling if they are mean, loud, or disrespectful. If you have more than one sibling and you're tired of receiving attention and ignoring each other, you might consider implementing a compromise where you ignore your sibling altogether.; -- For example, you might say, " there's no way in the world i'm ignoring it. I don't want to force you to stop.;
If your sibling is doing something annoying, first ask your sibling to stop. If your sibling has done something seriously wrong to you, try to first resolve the conflict.