I broke wind on her sweater
Why would you break wind on someone's sweater?
She always shows off her beauty, and this was the kind of crazy thing I like doing.
You should never fart on someone's things. It's just gross.  Imagine if everyone acted this way!
It doesn't matter as long as I don't get caught.
You're right that there were probably no repercussions from what you did, and it was likely just a harmless prank.  However, think about what could have happened if you had been caught.  It would have been very embarrassing to you, at best.