Jon was unsure how long he had been standing staring at Karyn's breasts in the mirror but it was more than a few minutes. He couldn't take his eyes away and he stood with his mouth open just soaking up the sight.
Feeling his erection quickly returning he was fascinated to watch as the skin around Karyn's nipples tightened up and they were soon standing at attention. The only downside to all this was that he couldn't actually reach out and touch them. As he watched Karyn's hand in the mirror slowly make it's way up and cup her breast all he felt was his usual male chest.
Feeling frisky, Jon reached down and peeled off the panties that his penis was doing a fairly good job of pulling down anyway. Turning again to the mirror and feeling the relief of his bulging erection standing tall Jon was again hypnotized by the sight before him. He was looking at his first ever in the flesh vagina. It was a sight to behold. So neat and flat with just a small amount of hair above the opening. Running his hand down and rubbing it along the length of his penis he stared at the reflection of Karyn rubbing the outside of her vagina. This was the hottest thing he had ever seen and he had never felt so horny in his life.
Deciding to turn the lights out and get in to bed where he planned to give himself some relief Jon, being adventurous decided to take Karyn's mom up on her offer. Opening the top drawer of Karyn's dresser he found a bag with 2 nighties inside. He took out the first one, a pink set which had a very frilly, lacy nightdress that looked like it would fall to about mid thigh and a pair of matching pink panties which were silky smooth and very soft. The panties had a lace edge and a little bow in the middle. Wanting so bad to see what Karyn would look like in something so sexy Jon decided to go for it. Nobody would know, he reassured himself.
He started with the panties, stepping into them and slowly bringing them up his legs. He had to really stretch the waist band over his erecting but with a little adjustment he was able to get them on. The silk felt amazing on his penis and Jon thought for a second that he was going to cum in his pants, or panties as the case was now.
Next he took the nighty and pulled it on over his head. It had 2 short puffy sleeves that sat up off his shoulders. Letting it go it fell down and sat where he guessed it would. Like the panties the material of the nightdress felt amazing on his skin. It tickled his nipples which caused his penis to twitch once again.
Taking a long look in the mirror Jon saw a very horny looking Karyn staring back at him. Her cheeks were flushed and her face had a sultry look. The nightdress had a big opening which showed off her impressive cleavage and when he moved at all the hem of it lifted up to give him a great view of the panties underneath.
No longer able to control himself Jon turned off the light and hopped under the sheets of Karyn's bed. He lay back and took stock of all these new sensations. His penis was twitching inside the panties just aching for release. His mind was feeding him some more memories of the girls locker room from earlier on. Multiple girls in various states of undress, gossiping and chatting. He remembered one girl brushing a friends hair for her, both of them standing only in their bras and panties.
His hands were almost on autopilot, roaming around his body, rubbing the soft material of the nightdress against his skin. Finally making their way to the panties, without going inside the panties he started to rub his penis within. His breathing was very heavy and his mind was running a mile a minute. He sped up his rubbing. One hand was circling the tip of his penis through the soft silk while the other cupped his balls through the lace. He couldn't hold it back anymore and he felt a surge from his balls and felt the sweet relief. He came inside the panties and it felt like it would go on for ever. It was easily the most powerful orgasm he had ever felt.
His mind clearing he lay in the bed with a huge grin on his face and fairly quickly drifted off to sleep.
