One consequence could be social. His peers might tease him if they find out. Also, if it's in a public or semi - public place, there could be more serious implications like getting in trouble with authorities for public indecency, although this would be a more extreme case. And he may feel a great deal of shame which could affect his self - esteem for a while.
He should first try to compose himself. Then, if it's appropriate, he should apologize. For example, if he's caught in a place where he shouldn't be doing that, saying sorry is a good start.
A story could be that the boy was caught breaking a neighbor's window while playing ball. The neighbor tells his parents, and as a result, he gets a spanking. It reflects on how children were held accountable for their actions in the past, and how the community and family worked together to teach children right from wrong.
There could be a myriad of interpretations for a 'best boy cumming story'. It could be a story set in a particular community where a boy named Best is known for his kind deeds. For example, he might be helping the local people, rescuing animals, or being an example of good moral character. However, without clear context, we can only guess what the story entails.
Since I don't know the exact nature of this 'best boy cumming story', I can't provide a proper example. But if we assume it's a story about a boy's success, it could be like this: There was a boy named Best who was really interested in music. He practiced every day, faced many rejections at first, but finally got a chance to perform in a big concert and became very popular. This could be a very basic example of what a 'best boy cumming story' might be like, depending on how you define it.
This is really awkward. I think you should give your mom some time to process what happened. She might be shocked at first. You can write her a note if you can't talk face - to - face right away. Say that you're sorry and that you'll be more discreet in the future. And don't let this one incident make you feel too bad about yourself, as everyone has these private moments.