The two headed down towards the library to search for a fertility spell. While Twilight normally loves going to the library, this trip she dreaded. To make matters worse, Velvet had wrapped her tail around Twilight's to keep her close. Once they arrived Velvet ordered, "Twily, this is your library. You should know where the books on fertility spells are, go find the right one."

Twilight asked, "Mom, can you just call me Twilight, I'm not a filly anymore."

Velvet smacked her flank, "No Twily and given the situation we're in, that is mommy to you."

Twilight realized that not only did Velvet want to engage in a tradition that would normally happen when she was just coming of age, that she was going to treat her the way she would at that age and expect her to behave in such a manner. She replied, "Ok mommy, I understand."

Velvet pulled Twilight into a deep passionate kiss. While Twilight was in a state of both shock and fear, Velvet was moaning in delight. Her tongue was exploring every nook and cranny of her daughter's mouth. After what seemed to be forever to Twilight, her mom pulled back, smacked her flank harder than before and snapped, "Twilight Sparkle, when mama gives you tongue you better give it back."

Twilight nervously replied, "Yes mommy."

Twilight began to look through the books hoping that she could find a book on fertility spells as soon as possible. Once she found one her mother smacked her flank and snapped, "It took you long enough."

Twilight replied, "I'm sorry mommy."

Velvet grabbed the book in her aura and ordered, "Your room, now!"

Twilight replied, "Yes mommy."

The two headed upstairs and once they arrived in Twilight's bedroom, Velvet shut and locked it, using a spell only she can break. She pointed at the book and ordered, "Find a spell and make it quick."

Twilight nervously began to flip through the pages of the book. There were many types of spells but finally she found the ones that she was looking for, fertility spells. Twilight said, "Alright, I found it."

They began to read it and while it looked like it would work Velvet asked, "That spell looks kind of vague. It needs to be altered a bit so that you'll be certain to have a filly."

Twilight replied, "Yes mommy, I understand."

Twilight was reading through it and realized that with a little bit of rewording it that it could work as her mother requested. She continued, "I think I have it."

Velvet replied, "Alright then, cast it and see if it works."

Twilight placed her horn up against Velvet's and began,

"While this mare desires a filly,
She desires the father's role,
While she has no way to produce a seed,
Her horn is what she would need,
For now her horn can spread the seed of life,
And with this she will cause no strife."

A purple beam of energy began to encircle Velvet. Her body began to tingle as her horn began to grow both in length and circumference. The transformation stopped once it had doubled in size. She gave Twilight a seductive look, pointed at her horn and asked, "Looks good doesn't it?"

Twilight replied, "Uh, yeah."

Velvet pounced on her and continued, "So good to penetrate you with, so good to keep in you, so good to knock you up with."

Twilight wanted to get this over with, "Mommy, so are we going to do this now?"

Velvet replied, "Oh no Twily, we have plenty of time." She pinned her down, began to grind her marehood up against that of Twilight and began to moan, "Oh Twily, it feels so good, oh Twily, oh Twily!" She noticed that Twilight was not moaning as well. This angered her so she smacked her flank, "Twily, does this not feel good? Does mama's marehood not feel good?"

Twilight replied, "I'm sorry mommy. This whole situation just doesn't feel right."

Velvet smacked her flank again and continued, "Well it better soon. Mama didn't come here for two weeks solely to knock you up."

Velvet's mean demeanor caused Twilight to ask, "Mommy, before we move on, was grandmare like this with you? Was she constantly smacking your flank, yelling at you and giving you icy cold glares?"

Velvet replied, "No because I did what good fillies do, I submitted to her. Now submit to me, enjoy this and perhaps this will become enjoyable for you." She lowered down to where they were face to face and continued, "Who knows Twily, you may like it so much you might want this quite often!"

Twilight asked, "Why would I want this quite often? Why would anypony want to commit incest with their mother quite often?"

Velvet laughed, "Oh once I came of age, mom and I did it every day while your grandstallion was at work." Her voice became more dreamy as she continued, "Oh and it felt so good! Mama was such a good lover!" Her voice became more stern as she finished, "And with any luck, you will feel the same way about me. I'll make you forget all about your friends and Celestia."

Twilight sighed, "Please mommy, since we have to do this, can we just get it over with."

Velvet snapped, "Fine Twily, but don't expect me to be soft with you the way your grandmare was with me."

Before Twilight could reply Velvet began to grind her again and started kissing her passionately. Twilight was not enjoying this and wanted to make it stop. She pulled her face to the side and yelled, "Velvet, stop it now!"

Velvet stopped grinding, pinned Twilight down and yelled, "What did you call me Twily?" She smacked Twilight and continued, "A daughter NEVER calls her mother by her name, especially in the situation we're in, got that little filly?"

Twilight mustered up every ounce of strength she had and kicked Velvet off of her. She got out of bed and walked over to where her mother was laying. She gave her an intense glare and snapped, "You know what Velvet, I am not a little filly anymore and I will not take part in your stupid incestuous tradition."

Velvet stood up, smacked her daughter and yelled, "How dare you call it stupid Twilight! It is something that dates back generations, many many generations and I don't care whether you like this or not, I'm going to knock you up, you'll have a filly, you'll name her Twilight and then continue this tradition with her."

Twilight was not thrilled that her mother would smack her, especially with her being a princess. She grabbed Velvet in her aura and growled, "Look Velvet, a real mother does not commit incest with her children, a real mother does not want romantic love from her children and a real mother does not want to use a fertility spell to get her daughter pregnant!"

Velvet began to reply but Twilight intensified the strength of her hold, causing her to be unable to speak. Her glare deepened as she continued, "Does dad know about this? Did my grandstallion know about what you and grandmare did? Have any of the fathers known what their wives and their daughters have done over the generations?"

Twilight released the hold on her mother and stared her down. Her glare turned into a full blown scowl as she continued, "Well? Does dad know, did grandstallion know?"

At that moment Velvet realized that she had better tell the truth, she realized that the fear Twilight had of her was no longer there. She shied back and replied, "No, your father does not know about me coming to do this nor have any of the stallions known about the tradition."

Twilight scoffed, "You seriously expect me to believe that none of the stallions knew their wives were initiating their daughters like this?" She smacked Velvet and continued, "Dad may not know about what you're doing but I doubt such a generation after generation tradition could be easily hidden from the stallions in the family."

Velvet scowled back at Twilight and yelled, "You know what, they didn't. Had your grandstallion known what we did he would have filed for divorce and turned mom in for incest."

Twilight couldn't help but laugh, "Kind of strange you bring up turning somepony in for incest. After what you did today, you are guilty of that crime." She became more stern as she continued, "And once I tell Celestia about this, you'll find yourself either in Tartarus or preferably, on the moon."

Velvet again smacked Twilight and yelled, "You know what you disobedient little brat, if you do that I'll expose you and Celestia to all of Equestria." She saw Twilight's eyes shrink and continued, "Don't think I don't know about everything you two have done. I know that from the day you matured, you two have done things you shouldn't have." She got a sly grin on her face and asked, "And you don't want your precious Celestia exposed now do you?"

For a moment, Twilight thought that she would easily be able to put her mother in her place and nip this problem in the bud. Now she realized that she would have to do some negotiating with her mother. She replied, "No, I don't want Celestia exposed, I would never want anypony to think badly of her."

Velvet pointed at her bed and continued, "Tell you what Twilight, just let me give you horn sex once and that will be it. If I get you pregnant, that will be wonderful. If I don't, I guess a wonderful tradition will be doomed to death."

For Twilight, this was not an option. For so long, even after becoming a princess, she had been a bit scared of her mother but finally standing up to her was liberating and she was not about to cave into this. She began to eyeball her mother's enhanced horn and gave her a counter offer, "How about this Velvet, I'll give you two options. I can either reverse that fertility spell or I'll rip that horn out of your head with my teeth." She saw a glare form on Velvet's face again and ordered, "Tell me, which is it? Would you rather simply not have fertility magic or would you rather lose your magic entirely?"

Velvet could read Twilight's eyes and knew that she wasn't kidding, for the first time in her life she was actually scared of Twilight. She replied, "I would rather you just remove the fertility spell."

Twilight gave her a smile and replied, "Good, that will make life so much easier on both of us!" Twilight headed for the exit and tried to open the door but remembered that Velvet had cast a lock spell on it. She turned back to her mother and asked, "Could you undo that lock spell on the door so I don't have to blow it off the hinges?"

Velvet reluctantly broke her spell and sighed, "Very well."

After the spell was broken, Twilight and Velvet headed down to the library to undo the fertility spell. While her last trip to the library was one that she dreaded, this trip would likely be her favorite of all time. As they headed to the library, Velvet couldn't help but have a deep scowl on her face. For her whole life, she had always been able to intimidate her daughter but that was no longer the case and it infuriated her.

Author's Note

Everything below the dividing line is alternate to the original chapter.