Let's start with some Edging

Hermione moaned as she felt the device ravaging her pussy stirring it up as it went. She held on to the handle parts she was tied to for dear life. She could feel her own orgasm slowly approaching as her toes began to curl against the ground she was on.

"Harry I'm going to cum! Harry!" Hermione cried out only to gasp in shock when the machine suddenly stopped. "W-what?" Hermione asked as Harry smiled to this.

"Harry what the machine stopped." Hermione began as Harry then smirked to her and rubbed her ass a bit.

"Hermione in basic BDSM the Dom decides if you earned the right to cum or not." Harry explained as Hermione was surprised, she had forgotten something so important. "Since I didn't give you permission to cum I stopped the machine." Harry said and thus Hermione moaned a bit with desire. "Now then time to add a bit." Harry began and in turn pulled out a blindfold over Hermione's eyes. "This will increase your sensitivity." Harry said and in turn Hermione's vision was blinded by a blindfold.

Hermione could not help but get a tad bit excited over what was about to happen to her next. "Now Hermione give me a safe word." Harry ordered and in turn Hermione nodded to this.

"Romeo." Hermione said making it clear that was the safe word. Just then a buzz of magic went off and thus she was confused.

"Good now the tools are set to Romeo if you want to change them just let me know." Harry said and in turn Hermione got ready for what came next. "Now let's continue and remember if your about to cum you best ask me first." Harry said and thus Hermione moaned out when she felt the machine come back on for her.

Harry smiled to Hermione as he saw how she cried out with desire from what Harry was doing to her. She wanted to cum bloody hell she wanted to cum, but Harry did not give her the ok. She didn't know how long she would last with this edging Harry was inflicting upon her. She did her level best to hold back her climax as she could tell her desire was covering the machine she was on.

Eventually her blast would come once more and thus Hermione knew she had to let Harry know. "Harry I'm about to cum, please can I cum?" Hermione asked and thus Harry considered it for a moment.

A.) Yes, but gives her a friendly reminder to refer to him as Sir.

B.) No, Hermione should know she shouldn't be using his name as the sub.