Cock... definitely cock.

Softly, Diane moved the hem of her thong downward only for her dick to spring up once it was half way out and lightly smack the underside of Gabby's cock, causing some precum droplets to fly in both of their face. Gabby let out a low moan and subconsciously bucked her hips, making her dick slap the underside of Diane's. No wonder those guys would end up waking up with cum on their bodies, they were probably sword fighting in their sleep.

Diane bent her head down and used one of her hands to hold Gabby's cock towards her face while the other softly stroked her own. She promptly planted her lips around the head before she dove in, getting some of her friend's dick to plunge into her throat, going back and forth to lather her friend's member in her saliva whilst tasting every in she could take. She didn't take her time and roughly made herself swallow as much as possible, including the constant small jets of precum shooting out of the moaning horn dog that was Gabby.

Diane wasn't the best cock sucker of the Academy... yet, but she had decent amount of experience in deep throating thanks to her first year around the older students.

Diane chocked down as much as she could, always gagging around the 8 inch mark, and jerked what couldn't go down. Though she would be left more horny after this, she stopped jerking herself and started massaging her friend's balls to help her cum faster. Gabby suddenly buck, making Diane swallow a whole 10 of her inches before her hands came and held Diane's head down as she blasted a big load deep into her gullet.

Once Gabby let go, Diane rushed her head back and began cough out some globs of cum she didn't get to swallow. Gabby was still sleeping but at least now she wasn't as erect and could focus more once she woke up. Still, now she was now left with a raging hard on.