No! Why would you even ask that stupid question?
Kenneth was directly expressing what he knew was his own truth. He wanted to have loyalty to his friend, but he knew it was in fact a rape and gave a straight forward answer.
Heck, he was the only one that had the balls to report it, which by then, he had already sold out his friend due to the crime he had just witnessed. Anything that came after, was just consequence of what could be considered snitching by his rapist friend, but his conscience weighed on him more.
It was a disgusting act, performed by a bunch of disgusting pigs.
Norman! What did you put in my tea?

No, he knew it was a rape. His conscience probably got to him.