After spending all day at the pool Thunder and Rumble decide to have a little fun when everpony is gone. While doing so they are interrupted by someponies.

WARNING INCLUDES: foalcon, incest, stallion x stallion and naughty ponies.

Inspired by a comic I found on tumblr. First Times and Tan Lines by Saurin on Inkbunny. All credit goes to the artist. Special thanks to @Corey19 for the title.