Role-playing.

“That’s yes Mrs. Roberts to you, young man!” she said authoritatively.

For a split second Frank was confused but suddenly realizing that his reward would be role-play he replied, “Yes Mrs. Roberts.”

They both stared at each other and began to laugh. “I’ll just go get my work clothes from my car, this should be fun.”

Returning 5 minutes later, Karen strolled through the door. Frank’s jaw dropped when he saw her. She had dark rimmed glasses on the end of her nose and her brown messy hair draped over her shoulder. Karen’s work clothes consisted of a tight fitting white blouse with the top 3 buttons undone, a grey pencil skirt that showed of her lovely rump and black high heels that framed her toned legs.

“Hello, Mr. Williamson.” She said huskily.

“Good afternoon, Mrs. Roberts.” Frank grinned.

“Class will begin shortly, please take your seat.” Frank sat down on the couch and Karen stood in the middle of the room. “Today we will have a math quiz Mr. Williamson. But because you have been such a devoted student I have a little reward for you. It will be a different short of quiz, every answer you answer correctly I will remove one item of clothing. How does that sound Mr. Williamson?”

“It sounds great Miss!” he said eagerly.

“Good, now first question: What is 2+2?” she smirked, looking down at him.

“4, Mrs. Roberts.”

“Very good Mr. Williamson.” Karen praised him and took off her glasses.

Several questions later, she was down to her blouse and skirt, she had taken off her glasses, each shoe, her watch and her necklace.

“And what is 10x10?” she asked.

“100.” He answered.

Karen sensually began to unzip her skirt. And eventually revealed a black thong that dived deep between her ass crack.

“5-2?” she said simply.

“3.”

Next was her blouse, Karen slowly begun to unbutton it, teasing him with every one. She wasn’t wearing a bra and was left standing there in only the small black fabric covering her pussy.

“4+8?”

“12.”

She wasted no time and dropped her thong to the floor, revealing her in all her naked glory.

“Well done, Mr. Williamson. You got them all right! For one last question I will let you do what ever you want with my body.” She smirked

“Okay.” Frank barely whispered.

“What is… 1+1?” She giggled.

Frank couldn’t even answer before Karen jumped on top of him, kissing him all over. She jerked his stiff rod firmly, rubbing her thumb over the tip.

“What do you want to do with me Mr. Williamson?” Karen gasped.

“Suck my dick, Miss.” Frank ordered.

“Certainly” she said, licking up the side of his massive length, “Anything for my favorite student.”

Karen tried desperately to fit his cock in her mouth but struggled greatly. She only managed to suck on the head while she jerked the rest of his penis. She twirled her tongue around and flicked the hole of his cock while she sucked, making him let out a loud sigh of pleasure.

The blowjob only lasted about 5 minutes before Karen asked, “What else would you like to do to me, young man?”

Frank grinned and led Karen over to a free space on the floor, telling her to get into the doggy style position.

“Now Mr. Williamson, if you can make me cum you will get an A, if you can’t I will have to personally teach you how in detention for the whole week.”

Frank doubted he had ever been as horny and plunged his erection balls deep in Karen. She shouted in surprise but made no attempt to stop him as he immediately started fucking her from behind.

Frank could feel her wet pussy milking his entire length and was sent into frenzy as he pounded into his teacher. Karen grunted deeply in approval, feeling his length fill her up and his balls slap against her clit.

Frank was on the verge of cumming and he moaned and shouted at the sensation, “I can’t hold it.” He told her.

“In my mouth, Mr. Williamson.” Karen replied, swinging around so that his cock head was in her mouth.

He couldn’t hold it any longer and exploded in her mouth, and like it was gold Karen drank every drop. She slurped and gargled his cum down her throat before looking up at him with a grin.

“You didn’t make me cum, so I guess we will have to continue this lesson in detention.” She said, licking her lips.

“Perhaps you could stay tonight and give me my punishment, Miss?”

“Very good idea Franklin.” Karen said licking his tool again, “Your report card will be glowing.”