Eric too was rapidly nearing climax as his tongue pierced greedily into Ty's butthole. His left hand has slid down south and was vigorously fingering his pussy as his right was wrapped firmly around Ty's thigh. His hefty bosom heaved with each breath, pushing into Ty's legs and forcing him to stumble gradually forward into the alchemist's bench.
He collided gently into the edge, causing a few of the vials to tumble over. One rolled towards him, stopping just before the edge. Looking down at the glowing fluid inside, Ty was struck by sudden inspiration. He grabbed the thing, undid the stopper, and twisted his flexible Elven spine around as far as he could. He managed to get a pretty good view of Eric's head dug in between his fat cheeks. His double jointed arms too were flexible enough to place the tube just above his ass crack.
He tilted the vial, letting the liquid flow out. It drained thick and slow like honey, dribbling down between his ass cheeks. Their impressive girth gave a sort of funneling effect, sending the liquid straight to Eric's unaware tongue. The busty rogue was too absorbed in ass-eating to notice as it entered his mouth and was swallowed down. It took a minute, but by the end he had ingested the whole concoction.
Eric shot back in shock a moment later as his entire body began to contort and shudder. Wracked by transformation, he shouted at his friend.
"Get the hell out!" he said in shock. "You tricked me!"
He has meant it metaphorically, but the slug in Ty's brain couldn't seem to tell the difference. Taking it as a literal command, Ty felt himself obligated to leave the room. He kept his eyes on the floor, avoiding any messages that might trap him. Escaping into the hallway, he finally glanced back. Eric's transformation had begun as he...