Please answer! - I was playing with my brother ...?

I was playing with my brother before he went to bed, and I put a sock in his mouth. He started to choke, and I pulled it out. Anyway, he started breathing again and sipping water. He told me his fine. He said "It's just the same as normal.", anyway he hates me now because I asked him. I kept checking if his alright, his nine by the way. Will he be alright through his sleep?