It was a Tuesday when Jacks parents told him that they were going on a trip until The following Monday. Jack being 17 and it being summer he could be left home alone. Jack was a very avergae boy didn't go to wild parties, drink, do bad in school or anything of the sort. He was a typical kid. Had his license for about 5 months now just starting to get the taste of freedom. Jack was happy his parents were leaving for a couple of days giving him some time alone or with his girlfriend, Michelle. They has been dating for a little over a year and begun to get serious. Jack stood 5'10" 170 lbs, a athletic person playing football and baseball. Michelle was a beautiful girl standing 5'4" with almost D cup breasts already as a 17 year old high school girl. Michelle was stunning and Jack was very happy that she choose him. Jack was an only child so he could get away with leaving his house when he pleased. Michelle had a little sister less than a year old that she had to take care of sometimes. The same week Jacks parents were away, Michelle's dad had to go Chicago for work and her mom worked the night shift from about 7pm -4am at the hospital.
On Tuesday when his parents left, Jack called Michelle to see if they could be together since he was free. Michelle could come over because it was the one night that her mom wasn't on call at the hospital. Michelle came over to Jacks expecting there to be some fun going on that night. Michelle came over at around 8 and they watched a movie together. After the movie had ended Michelle was cuddling right up into Jack. This was where the couple began to get intimate usually a lot of kissing and cuddling.
"Michelle, you are the most beautiful girl in the world." Jack said.
"Thank you so much babe, I don't deserve a boyfriend as good as you." Michelle responded. Michelle was feelings very intimate about Jack at this moment and majestically slipped her small hand into Jack's pants and began to give him a hand job. This was the first time that this has ever happened, but Jack wasn't about to stop it and got instantly hard. "Oh babe your huge." Michelle complimented. Jack began to blush as she was really getting him going. As Jack reached his peak Michelle kept going, harder and harder until his pants were so wet it was unreal.
"Oh my god Michelle, that was awesome. It felt so different having a girl do it for me." said Jack. Jack felt different because every time he had a sexual event with Michelle from now on things of size would change.
"I thinks that's enough for tonight but count on it going further the next time big guy. Cya tomorrow." Flirted Michelle.
Jack had shrunk from his normal state at 5'10" to a not big difference 5'8" as Michelle went from 5'4" to about 5'5" making the heigh gap from 6 inches to 4.

Jack woke up on Wednesday very happy with himself after what had happened last night with Michelle. It was the first time they had gotten intimate and now Michelle said they would be going further, he was very excited. Jack didn't really do much all day really waiting for this night that was about to happen. When he got dressed he regarded that his pants were a little long and shirt was a little big but it wasn't any big difference. Jack went to jack off during the day and while he was doing so he read some stupid article about how in rare cases when women are directly attributed to men orgasms the men shrink and women grow based off of how much they were involved. Jack laughed at the concept and as he had been for a while now, he had a sort of a stupid fetish for taller and giantess women. He wasn't into the sort of stuff, with like women 50 feet tall or sorts, just where the man was shorter. He was almost into maternal shit with big women playing with him. Michelle knew about the first one but not the second one. Jack was expecting a call from Michelle around 6 or 7 that night. Michelle called Jack at 7 and said she would be coming over a bit late taking her baby sister Teresa with her. Jack was excited as Michelle was coming over to be devious with him.
Michelle had been bored all day just thinking about Jack and what she could do with him later. The idea of him liking taller women dawned on her and she went into her and her moms closet looking for the tallest heels possible. They were 5 inch heels. Michelle planned on wearing them to put herself right about the exact same height as him. Michelle who had been a size 8 shoe for about 3 years didn't really fit well into her moms size 8. She figured that it wasn't really an 8 that the label had been wrong or it ran small. Michelle while driving over to Jack's house that night decided she was going to blow him. She has never done it before and from what her friends and the internet had to say it was a mans favorite thing. She actually watched porn a little during that day to help her decide what to do and learned some techniques.
Michelle arrived at Jacks a little past 830. Jack was waiting for her in agony to see what they were going to do that night. Michelle got out of here car slipped on the big heel and took Teresa out in the stroller. Walking up to s door she felt really big and tall, not normally like when she wears heels. She figured that these were higher heels than she would normally wear, guessing that they were around 6 inches(they were 5 but she didn't know). When Jack heard the door bell ring he basically got a boner, as he was walking to the door. Jack takes s deep breathe and opens the door to see Michelle looking over him while wearing a very revealing top."I knew you had a thing for the tall girls, so I got tall for you." Said Michelle.
"Your so tall and gorgeous." Jack awed.
"Are you ready to go baby, because I got a whole bag of tricks I'm ready to unleash on you." Michelle tempted.
"Let's go" Jack yelled. Michelle pulled her stroller into the house putting Teresa in a bedroom upstairs. Michelle came down from upstairs ready to go. She ambushed Jack, jumping on him and staring to kiss him. As they were violently kissing rubbing each other's bodies, Michelle started to easily undo Jacks pants. She was slowly pushing his pants off as Jack was already as hard as a rock. Down to his underwear, Jack picked up on what she was doing and took of his boxers leaving him naked for the waist down. Michelle saw how hard he was and as the kissing was happening, slowly started to slide down his body. She was kissing and licking his as she was on her way down. Finally reaching his dick, she began to kiss it and slowly suck on the tip. He was so hard it hurt. Michelle began to suck hard and thrust him him into her. Jack helped as he held her head as she was on her knees blowing him. Jack climaxed in her mouth and Michelle actually thought the warm liquid was nice. She pulled off him and swallowed all of it. As they had been done now taking a break Jack pulled out a movie for them to watch as they cleaned up. As they cuddled in to watch the movie, Jack had began to shrink going from 5'8" to about 5'5". And Michelle shot up to 5'7". Not noticing of the situation going on around them Michelle began to give Jack another hand job during the movie. Jack loved the thought of it and went with it. A couple of min later he finished all on her and himself. Another sexual action brought Jack from 5'5 to 5'3 and gave Michelle another inch. Michelle was sitting on the couch putting her heels on. She stood up to say goodbye to Jack who stood up to be looking right at right into her chest.
"Holy shit what the fuck is going on!!!" Jack yelled.
"What the fuck why are you so short!! And why am I so fucking tall. The heels only give 5 or so inches and you should be like a inch shorter not 10!! "Michelle exclaimed. Jack realized what he read online with in rare cases men shrink after preforming a sexual action with a woman. Jack explained all of this to her and the article said that it was it permanent. That the shrunken person and growing person should go right back to normal when they hit a certain point. That point could be at 4 inches of shrinking or at 4 feet of shrinking. No one know yet what determines it and there is no medical cure except to keep the sexuality up. They were both in shock.
"I think I might like a shorty boyfriend who has to look up to me. Haha, you have to look at my boobs all the time now." Michelle smirked.
"It isn't a bad thing you know, looking at your tits. I think I don't really know about this yet but it's weird. You are 5 inches taller without heels." Jack replied.
"Talk to you tomorrow so we can schedule our adventure tomorrow." Flirted Michelle.
"Bye baby." Jack said as she was going out the door.
"Your gonna be my baby soon, little guy." Michelle joked. Jack was worried about himself. Even though he was gonna enjoy this very much it was just the beginning. And he was worried.