Regarding “Did he stop it”
Its been reported that both Sandusky and The Victim saw McCleary..he knew he had been caught.
So - I have to think, the mere fact that they knew they had been caught would break it up.
I cant imagine that Sandusky just kept plugging away, even after he knew he had been caught red-handed.
Also - and I hate to broach this subject, but there has to be the remote possibility that the victim had been concentual...and not a forced rape. That does not diminish the evil, but might have left McQueary a bit confused about what he had witnessed.
Regardless - in either case, it would seem that there was no immediate concern for the kid.
A child, a minor below the age of consent, can NOT consent to sex. Period.