Getting it on... with the roommate

"Well Tim, that is a bit hard to explain!" Walter told him, still speaking in Jeri's voice.
"It seems to me that you were just horny!" Just as Tim finished the sentence, Tim's roommate Brad walked into the dorm and froze at the sight before him.
"Holy shit! Tim, who is that, your new girlfriend?" Brad asked as he marveled at the sight on the bed.
"Yeah, Brad... That is my new girl, Jeri!" Tim quickly spat out.
"Woah, nice! Jeri, you got a nice ass as well!"
"Now, hold on, Tim. I'm not 'your girl'! I was just horny and started streaking. Tim here, offered to bang me... I would however, be happy to 'upgrade'..." 'Jeri' spoke, making deliberate bedroom eyes at Brad.