Rainbow Dash has to pee after drinking a lot of soda and water during her athletic activities, so she deliberately and unabashedly lets it all out in her shorts. Twilight doesn't mind, besides, she wet her panties on her first trip to the bathroom.

Fluttershy also had to go really badly. Seeing Rainbow pee in her shorts, she was so excited she wet her panties right there. When she realizes what she has done, she doesn't mind too badly - she and Dashie can be wet together. Again.

A higher quality remake of my first pee edit of EqG Rainbow Dash, and I couldn't resist throwing Fluttershy in there. Also I've seen wetting pics that don't show wetness on their skirts, so I went with that style this time.

(Don't expect me to do a whole lot, I just felt I needed to do one better pee edit of Rainbow in this outfit because there's barely any on here (about one that I didn't do, and two more that I did) after the pee artist who inspired me left.)