As the single mother of an 18 year old boy, I wanted to help my son John improve his grades in his senior year. I knew I had to keep his mind off girls as much as possible during school. I found out from my sister Glenda, who was John's guidance counselor, that John had a crush on me. This gave me an idea. I could keep John's eighteen-year-old libido focused on me. Then he wouldn't be thinking about girls when he should be paying attention in class.
I bought a collection of short skirts, dresses and lingerie. Then I began displaying my body around the house in short dresses, stocking and heels. I flashed John my panties and my boobs. On school nights, if John did all his homework correctly, I modeled lingerie for him. My collection of sheer negligees showed off my huge breasts to perfection. The sheer panties let him see my shaved pussy.
When he decided which negligee he liked best, I hugged and kissed him goodnight so he could feel my barely-covered, swaying breasts on his chest. Sometimes I told him to get on his knees so I could massage his scalp before bed. I rubbed his head while his face hovered inches from my swollen, shaved pussy, barely covered by transparent panties.
Then I lay in bed, listening to the sounds of my son relieving his pent up desires next door. I knew he had a large penis and his orgasms were long and drawn out. Hearing his groans, I couldn't help fantasizing about how it would feel if he was relieving his tensions on me.
That gave me the idea of telling John I was taking sleeping pills. I said I was "out for the count" as soon as I went to bed. Then I lay in bed, waiting until John entered my room and slipped into my bed. With my eyes closed, I felt his hands roaming over my body. He slid my negligee up over my breasts and sucked and kissed my nipples. Then he pulled off my damp panties, while I lay passive and still. He spread my thighs and fingered me. Then he mounted me and for the first time I felt my son's hard penis in me.
After that, he had sex with my "sleeping body" nightly and left me soaked from his multiple ejaculations. But I discovered one morning when I went in his bedroom early that no matter how many orgasms he had at night, he still woke up with a hard-on. I realized I had to make sure he had an orgasm each morning before he went to school.
I set my alarm for 6.00 am and came in his room while he was still asleep. Then I reached under the covers and masturbated him in his sleep. Sometimes I couldn't resist letting him cum in my mouth and over my breasts. I even mounted him in his sleep sometimes and let him orgasm inside me before he awoke.
Realizing this might not be enough to satisfy his powerful sex drive, I also began using John's bathroom in the morning so he could watch me through the shower door as I stripped and rubbed lotion on my breasts in the mirror over the sink. During these morning displays I could see him behind me in the mirror, jerking off. I usually ended up pressing my naked body against the shower door for him to shoot his load on the glass.
John's grades improved with our new regime, but he still had C's in two classes. I decided more help was needed. I called my sister and discussed it with her. She was also concerned about John's progress in school and she agreed to help out. I told John that if he could raise his grades to all B's by his mid-term report we would have his aunt over for a Friday night visit. I promised him that she and I would reward him with a special lingerie show. John listened excitedly and he agreed to try harder in all his classes.
On his next report card, I was delighted to see that his grades had risen into the B range. He even had a B+ in English! I called my sister and told her the good news. Then I reminded her about our promise to John.
"Oh I haven't forgotten," she said, "in fact I've been ordering underwear online for the occasion. I think we can give him a good show. It's just before my time of the month and you know how I get. My breasts are extra big and swollen and my scent is strong. The men at work are all over me right now. So I'm ready to help John with his homework."
Glenda and I had a sexual history that began in our teens when we shared a bedroom. We both developed large breasts at puberty and we liked to compare how our bodies were developing. When we began to get excited about boys, that led to us masturbating in bed at night. One of our favorite games was to pretend one of us was a boy. We took turns and when it was her turn Glenda would grope my breasts and unfasten my bra.
I got so excited when she undid my bra and my big breasts burst out. I closed my eyes and enjoyed the thrill of a "boy" touching my swollen nipples and kissing and sucking my tits. Then she'd finger me or I'd rub myself on her leg and cum over and over until I was exhausted.
Glenda was always extra horny just before her period. When she was in that state her scent, her body language and the bitch-in-heat look in her eye always got me excited too. In our teens, we had torrid sex in the nights before her period. It always seemed natural for us to be sexual as sisters. We knew each other's bodies so well and we continued having sex as adults, though not as often.
I never married and Glenda's marriage was unhappy, which encouraged us to continue our intimacy. When she fought with her husband, she often spent the night at my place. She liked to take revenge on her angry, alcoholic husband by having wild sex with me and sometimes with other people too. She confided that she fantasized about the older boys in her school counseling sessions. Sometimes she enjoyed flashing them, bending over to pick up a dropped pencil or crossing her legs to show them her panties.
She had even acted out with some of the graduating seniors. She told me about having sex with two football players in her office. Her husband was on a binge at the time and she was refusing him sex, but it was around the time of her period and she was horny so she took revenge with two well-endowed high-school seniors. She had sex with them every day for a week, separately and together. At night she lay in bed beside her husband, touching her cum-soaked panties and thinking of all the ways they had used her.
As soon as I let Glenda in on Friday night, she dragged me up to my bedroom. John was in his room playing video games, so we made it to my room undisturbed. I locked the door and my sister put down her bag and took off her coat.
Underneath she was wearing nothing but a black lacy bra with matching panties, black fish-net thigh-highs and heels. She exposed herself dramatically and then approached me with a look that made my stomach melt.
Without a word she unclasped her bra and slipped the straps off her shoulders. The cups clung to her breasts, and when she bared them, her breasts were extra heavy. Her luscious nipples stood out an inch and I caressed them with the palms of my hands. She sighed and then took my hand and guided my fingers to her damp panties. I rubbed her swollen clit through the material. As I sniffed her rich scent on my fingers, I felt my pussy lips swell and open. I was aroused already and we hadn't even begun our night with John!
Glenda and I are the same size so she had brought some new underwear for me to try on. I chose a matching bra and panties and some seamed stockings. Then she put on a short skirt and a tight, sheer blouse. She unbuttoned her top until her cleavage was nicely exposed. I put on a short dress and we sprayed perfume on our breasts and thighs and went downstairs.
I had a chicken salad prepared, so all we had to do was set the dining room table and call John. He sat opposite Glenda and his eyes moved from her exposed cleavage to mine as he tried to concentrate on his food. My sister made light conversation about her work. I could tell from John's face and the way she kept shifting in her seat that she was doing something to him under the table.
I got up to get some water and spied on them from the kitchen. Sure enough, Glenda's foot was between John's thighs, stroking his crotch. He was caressing her calf, stretching his hand as far as he could up her fish-net covered thigh. When I returned from the kitchen, I moved closer to my sister and put my hand on her. She opened her legs to give me access and I caressed her, through her thin, damp panties.
As we finished out meal, Glenda said, "I have an idea how we can help John with his girlfriends. Would you like us to demonstrate how to take a girl's bra off John? Some boys are so clumsy and that can turn a girl off. We can show you the right method."
