Cum

You don't know how long this Stimulator lasts, you should cum as quickly as possible.
You thrust stronger and deeper for not longer than ten seconds more, then you can't hold it and erupt right in her. She moans loud and quickly turn around falling to her knees and starting to suck you clean.
After you're both done, she gets redressed quickly. "I gotta go, my other students await me. I hope you're there the next time."

You can hardly believe what just happened when you step out onto the corridor.