Contact support. Nothing will be resolved here.And keep in mind that account sharing is not allowed.
STOP SPAMMING! No one knows a way to help, it's been 1 minute calm down! Not everyone's on the forums 24/7. Please wait, I don't think there's a way. It should stop happening unless your brother is logging into his account on your IPad.
If your devices are connected I think the only way is to unconnected them. Even then it should stop happening.