Alex's Experiment, a modern family fanfic

I don't own, work for, know anyone who owns and or works for ABC and or ABC's Modern Family in any way. This story is requested by a guest

Due to the high volume of requests that keeps on growing when I post new/updated stories I am temporarily taking no more requests. I'm sorry for the inconvenience. I will be back doing requests once I shorten my masove requests by a lot. When seeing this {} on top of a story I'm back taking requests

A young teenage Alex wanted to do a little experiment on her little brother Luke. At the time Alex was fourteen while Luke was twelve. This experiment seemed it be somthing their older sister would do, as it involves a "sex" element. However Alex was more intrested in the data then the act of sex itself.

Alex herself has yet to have sex unlike Hailey who she is sure had it already. This data was more of growth. The growth Alex wanted to collect is dick size. She wanted to see how big her brother's dick is now when soft then hard all the way to when he's eighteen. She also wanted to know if pills would make the erection bigger than normal.

Alex knew this would take her six years to complete and will be checking Luke's groth every three months. It being in the middle of June Alex had to wait until it was the first day of July and more importantly wait until her little brother is asleep. After all Luke may not be the brightest but you can't just trick him to show you his dick.

Now if this experiment was on Hailey that would be a dIfferent story. When June did show up it was midnight and a school night. Alex would be either studying for a test that's in two weeks or reading a chapter or two ahead of he class. However she wanted to start the experiment.

When she got out of bed she noticed Hailey wasn't in her's. Alex just shook her head and went on with her mission. She grabbed the clipboard and ruler from under the bed before leaving the room. As she was heading to her brother's room her heart started to race. Is this how Harley felt when "sneaking out" Alex thought.

Alex's hand was soon on the door knob and she took a deep breath before opening it. She looked inside at her sleeping brother. The middle child made their way to the youngest and carefully pulled down the sheets to reveal he still wears pjs. Alex was hoping he was just in his boxers or underwear to make it easier on herself.

As she pulled both the pjs down she noticed his boxers/underwear was coming with it. She was glad Luke was still sleeping as his dick was slowly showing itself. Once fully revealed she saw Luke to already be hard. So she did what she came for and wrote down his size which was four inches. So now she sees how soft it was.

This was something she wasn't ready for. She thought she was jacking him off for a few seconds now she has to take a bigger risk and jack him off until he was fully soft. Sure she could estmit his soft state but she wanted the actual size. So Alex took a deep breath and put her hand on Luke's dick. She slowly started to jack Luke off causing him to let out a moan.

As she was jacking off the four inch dick with three of her fingers her eyes widened. The four inch boner wasn't a boner but his soft size. She did not know how she missed that as it wasn't sticking up as it just laid there. As she continued to jack off her brother the dick kept growing until it stopped at seven inches.

Alex for one was impressed. She wrote it down and pulled up his boxers/underwear along with his pjs and left his room. Alex kept this up not as long as she wanted to. As one night three months after Luke's sixteenth birthday he woke up to Alex jacking him off just as he got hard. The siblings just looked at each other. Alex not knowing what to say.

"Um Alex why are you holding my dick?"

"Um to um see how big it is."

"I could of told you that. It's big isn't it?"

Alex looked at the twelve inch dick in her hand. It truly was big for his age. In fact he always had a big dick for his age. Alex just looked at the big dick and back at Luke before she let go of it and stood up. However Luke had other ideas. He grabbed hold of Alex's hand and placed it on his hard dick.

"You could at least finish what you started. Fair warning I come alot."

Alex never went all the way when it came to jacking off her brother. Only enough to get him hard. She had planned on using pills but then decided against it as she would not know where to get her hands on it. As Alex was jacking off her brother making him moan she decided not to tell him about her so called "little" experiment.

Alex soon felt Luke's dick pulse and knew this is it she was going to see him cum for the first time. Not wanting to get shot in the face with cum or get it on her hand found a nearby sock and slipped it onto his dick and continued to jack him off until he shot his load into it. Luke just smiled as shot after shot went into his sock.

Luke managed to convince Alex to give him nightly hand jobs before bed. Alex really could not say no as he found her notes on his growing dick. Alex kept jacking Luke off until he was eighteen. That's when things changed. Instead of jacking off his now fourteen inch dick Alex was sucking on it for his eighteen birthday.

After that Luke stopped having Alex come by to play with his dick. He also never returns the favor of pleasuring her which was fine by Alex. However Alex would never see a dick like Luke's in person ever again and was glad it never slid into her pussy or even ass. If she ever wanted to see it again though she just goes to a porn site to see her little brother fucking some random girl.

End

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