[Mini Series] Loyalty's Changeling [Naughty]

You can see each pictures (6 versions) in full quality (2000 x 1500) here => http://imgur.com/a/fcRxf

"Rainbow Dash’s tomboyish personality always made everypony mistake her for being Fillyfooler, a mare that has no interest in stallions. While, it's true that she liked fooling around with mares from time to time, it didn't mean she wasn’t interested in stallions and their tools at all. She always wondered what it felt like to have real stallionhood deep inside her marehood afterall. How it was different from the cold rubber dildo she always used. But so far, no stallion had ever shown interest in her that way yet, and she didn't like to approach them herself. She thought it would make her less awesome that way, to beg for sex from a stallion like that. She always wondered if there was someone out here who wished to cum inside Rainbow Dash...To Inject their warm life essence deep inside her womb...

But her Changeling partner would be able to satisfy all her fantasies, since it could either be male or female for her. At first, she planned to let it have sex with her if it was able to win against her in a race. But then she realized that meant she will never be able to have sex with it at all, if it can't win against her until the very last day of its charity work. So she changed her rules, saying that the Changeling must satisfy her sexual needs if it lost to her instead.

Rainbow Dash was more like a bisexual pony interested in both genders, and fooling around with this Changeling was the best thing that ever happened in her sex life. With the ability to have a stallionhood, yet stay within a mare body, it enabled her to live her secret fantasy. She was also happy that her Changeling didn't take the "10 seconds flat" trait from her. Therefore, it could last longer than her, as she didn't last much longer in each set of orgasm than the Changeling did. She always enjoyed multiple orgasms, as this Changeling lasted long enough to give her a lot of them before it finally got its own chance to experience orgasm itself. And also enjoy the title of being the first creature to cum inside Rainbow Dash."

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This is a Changeling Selfcest Series that comes from the result of this vote:
Poll : i.imgur.com/UZJ0S3W.png
Result : i.imgur.com/KAUvhjp.png 

The structure of how this series will be posted: i.imgur.com/sITfH45.png 

The design of Changeling's Mane6 coming from : http://heilos.deviantart.com/art/Deception-is-Magic-329957720

Synopsis of Story:  

"In the end of Season 6, the Mane 6 returned to their home and found that their imposters (Black Changeling) were all still here.  After hearing about how their queen had lost and that a new king had ascended, they surrendered to the Mane 6 and they were forced to do charity work to atone for their crimes while under the Mane6’s supervision. However, they refused to give up the love they currently had in order to become colourful Changelings and join Thorax's hive, saying they will find their old queen once they had atoned from all their crimes.  

The Mane6 let these Changelings turn into Changeling versions of themselves, to better identify which pony each Changeling belonged to."