It’s the blonde’s last major attempt to dominate the brunette. She rides it out and while it feels good - it’s not orgasmic. After that, the dark haired one proves that she’s the best at sex in the dorm. She gets to the point of pulling cumms from her worn out opponent’s body until there’s no more to take.
The true pecking order in the dorm is established and the blonde will now defer to her superior.