Why did they step into the puddle and what makes them fight?

The two girls were playing. Mean while the idea, of playing in the water of a small pool and to spread water in fun, came in their mind. So they stepped into the pool. The reason behind the fight between those two girls’ was also funny. Malasha suddenly plumped down her foot in the water of the pool. It was so sudden and heavy that the water spread and splashed right on Akoulya’s frock, eyes and nose. It made her frock dirty and coated with mud. Akoula thought that Malasha had done it intentionally, in order to make her dress dirty. So, she became angry and ran after Malasha to hit her forcefully. Thus, they fought for their own reasons, forming a prejuidiced opinion about one another.