What is the hint of Mouth and Shelly's relationship>

The hint was when they slept together. Just a hint

They never really had a relationship, she detto yes to prom on the episode titled "pictures of you", than on the successivo episode they were in a classroom making out, Shelly's fellow clean teen members see the two exiting the room and she freaks out and says they can't be together, than she sleeps with Mouth and after says they can't be together and prom is off and tells him never to contact her, and the last time they see eachother is the season finale at Rachels party where he punches a guy for calling Shelly a slut and pretty much end of story.

He slept with here and she is a clean teen o should i say was lol

Even tho shelley was a "CLEEN TEEN" they slept together anyway