[per loin]

She never said no. They both said the sex was consensual. Her: "I should be going now." could well be taken as a "Hurry up and finish."

As for "no" always meaning "no", nonsense. "No" is often but a part of the dance.

[Teacher317]

Add to that fact that you can say ANYTHING to a guy during sex, and will take him at least 90 seconds for it to sink in.

"Honey, the curtains are on fire."
Oh, yeah, baby, oh yeah, on fire, oh yeah!
"Now the cat's throwing up on your Babe Ruth rookie card" (worth thousands)
whatever does it for ya, honey. oh yeah! Go kitty go!

Also add in the fact that they went through ALL of the motions, all of the build-up , all of the conversation, permission, and desires to get where they were. A minor comment of "I gotta be going soon", after all the build-up plus some time in the act itself... minus any physical efforts to stop him... minus any screaming in pain or for help... 90 seconds seems rather quick to me.