Master First

"Don't get me wrong pet, you will get to cum, but not before I do. If you cum before I shoot my load then you will be punished severely, with the charm still active of course." Harry stated

"Of course Master. I would not expect anything less of you. Thank you for being so kind." She replied. She had the best Master. She didn't deserve his kindness, or his orgasms.

Harry cast the charm then plunged deep into his longest slave. She cried out in ecstasy but was able to stop herself from cuming. Harry was impressed as the only other one to achieve this was his second longest slave an she was a try hard at everything. But could she hold out against another few thrusts?

First thrust. She managed to hold out again, but it was harder than the first time as the charm worked it's magic on her. It was torture but she loved it.

Second thrust. She almost opened her flood gates but managed to close them just before she spayed all over the place. She was already thinking of the ways her master will punish her when she releases.

Third thrust. By some grace of Merlin she had managed to hold in once again but she was certain on the next thrust she was gonna cum, and there was nothing she could do to stop it.