Friend or Foe?

Athena X Poseidon Dedicated to my dearest friend! I hope you like it because I almost died trying to do this. ONESHOT? Smut? This is my first "hate sex" and girl x boy fanfiction, so excuse me if I somehow make any mistakes. Also, I'm going with what I know about the Greek mythology so forgive me if I made any mistakes in this as well. PS { PLEASE DO COMMENT YOUR OPINION }