She was surprised to see him gently stroking his erect penis while lay back on his bed. He was still wearing his work shirt but had his pants and underwear were laying on the floor. Surprisingly, Mary had never actually watched a man masturbating before, and it intrigued her. Even from her view in the mirror, she could tell that Carsten had an impressive penis, and it stood straight out from his body without curve or twist.
Mary watched intently as he pulled on his penis, stroking in up and down. Swollen with blood, the magnificent erection was sort of purple, slightly darker than her step-son’s normal Germanic pale complexion. It looked about 8 inches long and quite thick; almost the same size as his father, her late husband. It certainly was thicker than the toy she had just removed from her own pussy.
As she continued to watch, his hand moved up and down faster, and she saw his legs stiffen and his toes curl. She knew he was close and felt riveted to this spot.
“Oh fuck…Mary,” he grunted, scaring her for just a moment. But then Carsten’s whole body convulsed one time and he arched his hips forward. She watched in wonder as her step-son began to ejaculate, shooting thick string of semen up 5 or 6 inches before landing on his shirt. He squeezed his cock with his fist and a second and third squirt of cum came out and dribbled down over his fist. Then with a deep sigh, Carsten released his cock and sunk into his bed panting and sated.
Mary carefully eased back across the hall into her own room, moving slowly and carefully so as not to make a sound, she eased herself down onto her bed and lay there, her mind in turmoil at what she just observed.
…..
The next day at work, Mary was distracted and quiet as she tried to process what had happened last night. She tried to dismiss it as an unfortunate mistake and a young man’s hormones, but then the image of Carsten’s thick cock shooting cum into the air popped into her brain and she lost control. By the time her afternoon break came around, she caught herself inching down there. A quick feel and she found that her pants were moist between her legs. She made a quick exit to the bathroom and moved into a stall.
She pulled her slacks and panties down and, seating herself on the toilet, opened her purse in search of her emergency mini-pad to line her panties with. She tore the package open and placed the pad into the crotch of her panties. She was not due for a period for at least three weeks, so curious and what was going on, she rubbed two fingers across her labia and brought them to her nose.
Her nostrils flared at the musky smell of her own arousal and, after carefully listening to see if anyone was in the rest room, she brought the fingers to her lips. The sweet and salty taste of her own pussy caused a bolt of energy in her belly. With her mind nearly in a dream state, her fingers found their way back down to her labia, where she began to explore and rub the swollen parts of her sex. Within moments she had two fingers inside her cunt while her thumb caressed her clit, bringing herself off in a quiet orgasm while she pictured that big cock from last night.