One of the original AT artists (I think it was Rebecca Sugar, I can never remember) used to hang out in the ATDTs and occasionally draw something. Well, one of the drawfags in the thread made it weird when they drew a picture of her eating nachos out of her vagina. She left after that, and it was a debacle.
Allegedly, she would show up in the thread every now and then to do a piece, but she never made it known if we were talking to her. This one is believed to be from her.