Kat just graduated from high school and had received an athletic tennis scholarship. She is an entitled, cute brunette, and she believes the world revolves around her. Her mother, Sarah, is a beautiful fifty-year-old redhead with enormous tits and a nice, firm, round ass. She is the owner of the architectural firm where I work. I have been having an affair with Sarah for the past five years. We are both married, and it is only about tremendous and intense sex.

My wife, Lani, is two years my junior at thirty-eight years old. Lani is a successful realtor. Her clients love her personality, and it doesn't hurt that she looks like the supermodel Christy Brinkley. She has been mistaken for her frequently. When we have sex, she gives her complete self to me. She loves to be spanked and verbally abused. Being tied up and used is her favorite activity. When I tie her up and fuck all her holes, she cums so hard. Unfortunately, Lani was never faithful to me. I caught her at our house two weeks after our wedding, tied up and being fucked by three of her clients.

That's why I have no remorse for cheating on her as she continues to fuck clients to sell houses and commercial real estate.

I had Sarah on her knees in her office as she was sucking my thick eight-inch cock. She was pinching and twisting her fat nipples while I was fucking her face. "Glug, glug, glug, glug," echoed in the office when I spied Kat peeking through the door crack at her mother taking a big cock down her throat. I pulled back out of her mouth about an inch, so that Kat could see me spray into her mom's mouth.

I sat Sarah on the edge of her desk and pulled her panties off. She pulled her dress to her waist and spread her meaty thighs. Her red, fiery bush was long and wild. My cock tapped on her clit when Sarah heavily panted, "Quit teasing me and fuck my pussy with your big cock."

I buried my shaft into Sarah as she loudly grunted. She grabbed the back of my neck and thrust her hips wildly so that my cock fully penetrated her repeatedly. "Ugh, oh yeah, here I cum baby, ugh, ooh, fuck, no one makes me cum like you, Mac," she cried out. Her cunt squeezed hard around my cock as her orgasmic juices seeped around my shaft and dripped onto the floor. I added my man cum to the mess on her thighs and floor.

"Whew, baby! That was one of our better fucks; it was like you were putting on a show," Sarah gasped as the office door clicked shut.

When I got home, Lani said that Kat had left me a message that I owed her a tennis lesson. I was a tennis coach at the country club on the weekends. I had coached Kat since she was five years old. I thought, “I just gave her a lesson in pleasing her mother.”

Kat showed up early Saturday morning wearing her tennis warm-up clothes and with her long curly brown hair in a high, tight ponytail. I wore traditional white tennis shorts with a jockstrap and a white polo shirt.

At forty, I had a strong, hard serve, but Kat had the energy and quickness to dominate the volley. After an hour and a half of play, both teams had tied, with two sets each. I was leading in the final set, four games to three, when Kat slipped out of her training suit, revealing a very inappropriate tennis outfit. Her top was tight and exposed her midriff, which was not allowed. She wore no bra, so her nipples poked through the thin fabric. Unlike her big-breasted mother, Kat had small, teacup-sized breasts. She wore a next-to-nothing tennis skirt with a white sheer thong underneath.

Her outfit was her secret weapon as my concentration was lost in lust, and she won the final three games, set, and match. We walked to the net to shake hands, but she reached over and grabbed my balls, and whispered, "I want you to teach me how to fuck. I want to feel my first real orgasm from a cock. Can you do that for me, Mac? Can you give me an orgasm?"

"Meet me in the coach’s office in ten minutes, and I will teach you a lesson you won't ever forget," I replied.

I was sitting in the office when Kat came in, shut the door, and locked it. She threw her gear down on the floor. I had taken a quick shower, but I could smell two hours of tennis play on Kat. She still had beads of sweat on her brow. Her aroma was intoxicating as I pulled her over to me. My hands quickly grabbed the waistband of her training pants and pulled them down to her ankles.

My face was close to her crotch, and a distinct aroma wafted to my nose. Arousal and perspiration hit my senses, and my cock twitched in my shorts. "Your first lesson, sweetheart, is to expect the unexpected," I said through clenched teeth. I pulled her onto my lap, and her short skirt did not cover her firm, young ass. Usually at seventeen, a girl’s ass was firm but giggly, but since Kat played tennis for hours every day, her ass was firm and taught.

Kat jumped as my bare hand came down on her ass cheeks. Her cheeks were bare with the floss of her sheer white thong between them. I spanked her ass repeatedly as she whimpered and cried. I made sure it stung to teach her a lesson for teasing older men. She was begging me to stop as her ass was beet red with growing blisters. I intended to punish her and send her on her way. I was not about to fuck her and ruin my relationship with her mother.

Kat stood up and hopped around the room, rubbing her ass after I released her from my grip. Kat stood still and stared at me with determination.

"Go home and soak in a hot bubble bath with Epsom salts. I know you watched your mother and me the other day. Having sex with me is not a good way to get back at your mom for cheating on your dad," I counseled.

Her dad was a real estate adjuster. He has often left my wife tied up at home with his cum dripping out of her ass and pussy. He would put his business card in her mouth and gag her. I would, in turn, send him a text each time I came into one of his wife's holes and told him to taste me. Lani would always tell me that when she got home after having sex that her husband, Rick, would either eat her ass or pussy. She said that he loved the taste of her. She knew he had to be tasting me as well. She would laugh, and we would joke about him being a cuck. Lani was not aware of Rick's and my game.

More determined than ever, Kat pulled her top off her sweats and her tennis shirt over her head. Her firm, teacup-sized breasts were heaving up and down as she slipped her skirt off as well. Her nipples pointed upwards on her breasts, and her areolas were small and dark. Her fists clenched.

"I know you find me attractive as your cock is straining in your shorts. I'm not trying to get back at my mother. I know she has been fucking you for years. I know my dad has been cheating on her as well. I just saw you fucking her, and the sight of your cock working my mom's mouth and pussy just turned me on. I have never touched a cock before, as I haven't dated, like all the other girls. I have spent all my time playing tennis or studying. I masturbate just about every night, fantasizing about different boys that I am attracted to. I, uh, want to suck your cock, and I want you to take my cherry," Kat explained.

Kat hesitantly walked over to me, and she slipped my shorts down to my ankles. I kicked them off. I hadn't put on the jockstrap as it was smelly. So Kat was right; my thick cock stood straight up into the air. She knelt before me and wrapped both hands around my shaft. I let out a soft moan as she worked my cock up and down.

"Mmmm, you feel nice, Mac. Hard but warm and soft," she whispered. I reached up and cradled each firm breast in my hands. A drop of pre-cum appeared at the tip of my cock.

"Lick that drop off, then run your tongue around the rim and drag your lips on the top," I coached.

"Mmm, salty, " she moaned. I pushed her head further down, stretching her lips. When my cock hit her uvula, she came off coughing and gagging.

Laughing, I said, "Practice going deeper down your throat with a skinnier cock. For now, just suck on what you can." Kat slipped my cock back into her mouth as I used her ponytail as a handle. I eased my cock in and out of her soft, warm mouth. She did a great job using good suction and twirling her tongue. She held the base tight and pumped it as she sucked. Her beautiful, big blue eyes stared up at me, looking for approval, and her bouncing, perfect tits put me over the top. “Get ready, darling, I'm going to cum in your sexy mouth," I warned.

She braced herself as she felt my cock pulsing inside her mouth as it filled her up with ropes of my salty seed. Kat was proud that she had made me cum, and that she had swallowed all of my gift. "Good girl," I growled.

"I'm ready to fuck," she announced as she pulled down her thong. Her pussy was like a work of art. A nicely trimmed brown triangular bush above pink, long, floppy pussy lips. As she sat on the edge of the desk and spread her legs, I could see her pink entrance open up between her folds and her tiny clit emerge from under its hood.

"No fucking yet; first, I am going to taste you," I said. I picked her legs up by her ankles and put her feet on top of my shoulders. Her pretty pink starfish puckered tight, and juices leaked out of her pink tunnel and ran onto her anus.

My tongue licked over her starfish, causing Kat to squeal in pleasure. I twirled my tongue around her anus and across it. Kat was enjoying her anal rimming. I darted my tongue deep into her anus, which caused Kat to squeeze my head with her strong thighs. She bucked her hips as I vigorously ate her ass.

My tongue moved forward and dipped into her wet pink hole. Her pussy tasted fresh and tangy. I lapped up all of her juices that had pooled around her cunt. Then I sucked her love button as two fingers sank into her tight pussy. "Oh, fuck," Kat screamed as she climaxed.

Kat was still panting as I stood and placed my cock at her entrance. She bit her bottom lip as I slowly pushed my cock into her pussy. The folds stretched, and then her hymen snapped loudly. Kat whimpered, and tears rolled down her cheeks. I didn't believe her when she told me she was a virgin. The blood that seeped out from around my shaft made me a believer.

Kat sniffed and whispered, "Fuck me, make me cum with your cock. I want to feel your warm seed deep inside me." I pushed forward into her tight tunnel. Her fingernails dug into my back. I gave a final push, and I was fully impaled in her cunt. She let out a loud grunt as our bodies squeezed together. My mouth sucked in most of her right breast as I pumped in and out of her.

Kat's heels dug into my ass and helped set the methodical rhythm of our fucking. Her pussy felt glorious around my thick shaft. Kat's breathing became erratic, and her head thrashed from side to side. Her first orgasm from penile penetration was intense. She shook for a few minutes as her pussy convulsed around my cock. I continued my thrusting at a quicker pace. Beads of sweat were building up on my forehead as I was getting close. I didn't know what her birth control situation was, and at this point, I didn't care.

I grunted and spread my swimmers deep inside this young, beautiful woman. Kat climaxed again when she felt my warm cum splatter into her.

I let Kat shower in the coach’s shower. She washed all the evidence of my presence off her. I kept her juices on my cock for my wife to suck off when I got home.

I texted her dad when she left. 'Kat was very good in her lesson today. She fully gave her all in today's lesson.'