Playing in the mud

"EEEK!" Rarity cried out when a small ball of mud hit her cheek and splattered across it. "Rainbow Dash!" she screamed immediately, hearing the laughter of the unapologetic pegasus. Scoffing and sniffing, Rarity continued the act: "This isn't funny, I said I was only going to get my hooves dirty and not an inch more and I meant it! I swear by Celestia, you are impossible and I never should have trusted you..."
But even as her flow of disdainful words continued on and on, her mind was already elsewhere. She used her magic to lift up a ball of mud of her own. Just few more seconds and then she was going to hit Rainbow with it, in order to take revenge for her cheek.
Of course, she knew that such an act would not pass without retribution. She knew that the attack will certainly provoke Rainbow Dash into retaliation, and what would happen afterwards could only be described as a bloodbath, that is, mudbath.
But really, the truth of the matter was that she didn't mind. She didn't mind getting dirty not matter how much she liked to pretend otherwise.

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Request for

Let me just honestly say, this was ha-a-a-rd and I should not be allowed to draw things like this, because really. I had no idea how to make Rarity look like she's enjoying and not enjoying this at the same time. For a while I even considered making it a comic out of desperation, but then I couldn't bring myself to draw more than I did and settled on this... whatever it is.
Well, let it at least not be said that I didn't warn you. I haven't drawn anything in forever.