A.N. I just couldn't get this idea out of my head and it demanded to be written so here we are. This will be an explicit Harry/Lily Evans story with mentions of James/Lily.

James Potter was sitting in the kitchen, reading the daily prophet while his wife, Lily Potter cooked breakfast along with humming a beautiful melody. James smiled at his wife. She was a beautiful woman with her fiery red hair and curvaceous body. He was quite lucky in bagging such a goddess. It took years but he won in the end and convinced her to marry him. She was wearing loose pink shorts and a blue t-shirt. James's thoughts turned to his son Harry, whose thirteenth Birthday was today.

James was eager to give Harry the best gift for his thirteenth Birthday. James had observed the expected change in his son's behaviour. The change which all Potter men go through. He had seen Harry's innocent touches turning into lustful touches regarding Lily. James was amused and had expected that. It was the same thing he had done during his own puberty. It was totally normal for Potter boys. It was finally time to pass down the Potter secret to his son. As he was thinking of him, Harry came into the kitchen, rubbing his bleary eyes.

"Morning, dad. Morning, mum." he said, giving him a smile.

"Good morning, Harry and very Happy birthday." he grinned, clapping his hands enthusiastically.

"Thanks dad." Harry chucked at his father's enthusiasm. Harry then walked towards his mother and hugged her from behind as she continued cooking.

"Why am I not hearing a birthday wish from you?" he asked, playfully and squeezing her waist.

"You wished your father good morning first and not me. That's not fair. I thought I was your favourite person. You should have said, 'Good morning, mum. Good morning, dad.'" Lily replied jokingly, cooking on the frying pan.

"It's too early to see you guys competing with each other." Harry grumbled, pressing his whole body behind her. He was shorter than Lily so his head was on the nape of her neck. She wore her hair in a bun, exposing the skin of her neck, giving him a chance to place a chaste kiss there. His hands were snaked around her waist and his hips were pressed on her shorts clad arse, not too tightly to alarm her and not too lightly to be innocent.

"Harry! It tickles." Lily giggled and quivered, unintentionally grinding her back on his morning wood. Harry stifled a moan as her plump bottom squeezed his boner for an instant. James was watching the scene with amusement. He had to declare that Lily was totally ignorant when it came to Harry's touches on her. She never stiffened when Harry 'accidentally' brushed his hands on her sexual parts. She never realised that her little Harry was growing up.

"I am still waiting for 'good morning' and 'Happy Birthday my handsome Harry'." Harry laughed, again kissing her on her neck, eliciting another giggle from her and grinding his groin on her arse with a little pressure. James wanted to shout, 'LILY, HE IS DRY HUMPING YOU. OPEN YOUR EYES.'

James wanted to laugh at the situation. The brightest witch of her age being fooled by her newly thirteen turned son. It was quite hilarious.

"Good morning, Harry. And Happy birthday my handsome boy." she said with a big smile and turned her head, pressing a kiss on his cheek before going back to cooking. "Breakfast will be ready in two minutes. Sit on your dining chair, darling."

"Nah! I am fine with hugging my favourite person." Harry grinned, nuzzling her neck. "You don't mind, do you? I will not disturb you."

"Ha! Hear that James, I am Harry's favourite person. Take that." she yelled smugly, " And no darling, I don't mind just don't tickle on my neck."

"Sure, mum." Harry smiled, getting cozy behind her.

"Yeah, Yeah! His opinion will change when I will give him the best birthday gift tonight." James mumbled which no one heard.

James watched as Harry's one hand unwrapped from around her waist and hung to his side. Lily didn't notice it. Harry's eyes were closed as his face rested on her neck. Lily continued humming a beautiful tone with a brilliant smile. James rolled his eyes as he saw Harry putting the palm from his now free hand on Lily's pink shorts, basically cupping her one arse cheek but he didn't squeeze her bum, he just placed it there, feeling the warmth of her skin through the thin pink fabric, getting the shape of her voluptuous flesh. Lily didn't bat an eye, not noticing it or ignoring it.

"Breakfast is ready." Lily announced. James wanted to laugh at Harry's disappointed look as he moved away from her sexy body and took his place on the dining chair. The three then discussed the birthday party which was going to be tonight.

The rest of the day went as usual. James went to work. Lily did the housework. Harry did some reading and he also didn't miss any chance of 'accidently' touching his mother's intimate body parts.

The party was a blast. Harry loved the evening as he celebrated his birthday with his friends and family. When all guests were gone, the three Potter sat on the sofa and were watching their favourite movie. Harry sat between his parents with their arms loosely around his shoulder. Harry grinned happily. He had the best family. Though he was quite happy, he didn't waste the chance to touch his mother. He gently pushed his hands on her hips and rested his head on them, in her lap. He smiled mischievously as he felt the heat from her lap as her red knee length skirt was very thin.

"Are you sleepy, Harry?" Lily asked, smiling fondly at him, running her fingers through his messy hair.

"Nah! Just resting." he mumbled, staring at the TV absent-mindedly while he tried to imagine her shapely thighs which were under his arms.

"'Kay, darling." Lily replied, trying to concentrate on the TV. James was impressed at how Harry had Lily wrapped around his finger. He decided it was the time to finally reveal the tradition to Harry.

"Hey, Harry. Come with me. I am going to give you your birthday gift." James said, patting his shoulder. Harry quickly sat, forgetting Lily's lap.

"What? But you did give me the marauders map for the gift tonight." Harry asked, confused and surprised. Lily gave him a suspicious look.

"Are you trying to win over Harry? I clearly beat you in giving him the best gift. Is this your another try to change Harry's allegiance?" she asked sarcastically. Harry put his palm on her mouth, effectively shutting her up.

"Shush, mom. Don't cancel my second gift. So what is it?" he said, looking expectantly at his father who was chuckling softly at them.

"For that you have to come to my study. Come on champ." James grinned, ruffling his hair and standing up.

"Okay!" Harry said, jumping from the sofa in excitement.

"Hey! Don't leave me alone." Lily grumbled.

"It will be just five minutes, Lils. I think you can manage until then." James said, smirking at her and leaving the living room. Lily shook her head in amusement.

"I will be back quickly, mum." Harry smiled and kissed her on the cheek. Lily smiled and nodded. Harry leaned down and whispered in her ear.

"Don't worry. You will be my most favourite person in the world. Nothing can change that." He then gave her a big audible kiss on her cheek and ran after his father, leaving a chuckling Lily behind.

Harry entered his father's study. His father was sitting on his chair, behind the desk and motioned Harry to take a seat in from him. He eagerly sat on the chair and looked at him expectantly.

"So, the gift I am going to give you will be ready by midnight but before that I need to pass down a secret of our family to you. The one only known by the Potter men." James said, leaning on the desk. Harry gave him a dubious look. 'Why was the gift going to be ready by midnight? What was it?'

"What secret?" Harry asked. James gave him a sly smile.

"The one I only can tell you according to the family magic. The one which you will pass to your son or sons."

"Dad, cut the theatrics. I am getting impatient."

"Okay. Let's get directly to the point. I know how you feel about your mother. I know how you grope her." James said frankly. Harry paled at his words.

"What? You must have misunderstood. I don't grope mom. I will never do that. She is my mother for the fuck sake." Harry protested heatedly. James just laughed softly.

"Don't worry, Harry. I am not mad or anything. It is totally normal for Potter men to lust for their mother. I at some point also groped my own mom and was sexually attracted to her. You don't have to feel ashamed. It is our destiny. It all has to do with the secret. Now just accept it so I can pass on the secret." James said in a soothing voice. To say Harry was surprised was an understatement. He was flabbergasted.

"You grope granny."

James nodded. Harry was silent for a minute, deciding whether his father was trying to prank him or something. But he only found sincerity in his father's warm hazel eyes. He was being honest. Harry gulped and nodded.

"I am sexually attracted to mom. It all started when I turned twelve." Harry said, hanging his head down.

"Come on, Harry. Don't feel guilty. It is not your fault. It was destiny. Don't be embarrassed about it. Held your head high. You didn't do anything wrong." James assured him. Harry gave him a small smile and nodded.

"The secret?" he asked.

"You see, every man in the Potter family is attracted to their mother. It has been going on for hundreds of years. When a Potter child turns thirteen, their father reveals the secret to them. The secret is that both the father and son start sharing the woman between them." James explained, winking at his blushing face. Harry felt tight in his pants. 'Were his dreams going to come true? Was he finally going to ravage his mother? Was he finally going to fulfill his fantasy?'

"How?" Harry asked, trying to contain his enthusiasm.

"You see, your mother has two holes. Vagina and the anus. It is a tradition that the Potter husband preserves his wife's anal virginity. He only ever uses her pussy and stays away from the arse hole. It is reserved only for the son. When the son turns thirteen, he then finally takes the virginity of the arse. It is a rule that the father can only use the pussy while the son can only use the arse." James explained. Harry didn't know he could get more hard, but he did at imagining his mother's holes. The disappointment of never fucking her pussy was overwhelmed by his joy of at least penetrating her arse.

"The son then can continue using his mother's body until he is married. But he has to stop after his marriage." James continued.

"What if I have two or more sons?" Harry asked.

"Then they have to share the arse. The pussy is only for the husband." James shrugged.

"What if I only have a daughter?"

"Not possible. Never happened and will never happen. Potters always have at least one male child."

"What if the father dies before revealing the secret?"

"Then it will stop, I guess. It is not as if you will die if you don't have sex with your mother." James answered in amusement. Harry tried to find more questions but now he only had two.

"What if the woman marrying in the Potter family is not virgin in any holes?" Harry asked. James scoffed.

"That doesn't happen. Potters are very famous to find their true love. They wait until the marriage. It is almost like fate."

Harry mulled over his words, impressed by how unique Potters were.

"And finally, how are we going to convince mom?" Harry asked dreadfully. He was quite sure she wouldn't agree. She still saw him as her little baby which gave him a free reign to grope her but was hindrance in this situation. James smirked as he pulled out a vial filled with blue liquid.

"I will slip this in her water and she will sleep like dead. When you finish inside her arse hole, Potter magic will work and Lily will lose her inhibitions around you. In a few days she will start seducing you and will only want you in her arse." James said with a straight face as if he didn't just gave him his permission to rape his own mother in the sleep.

"Isn't this bad? I mean, it would be unfair to mom." Harry whispered.

"It is. But it is a tradition. It doesn't change the person or anything. It just gives them one more man to love. It only makes them stop caring for societal rules like incest. It doesn't create new feelings. Just as Potter men are attracted to their mothers, the same can be said for the mothers, they are also attracted to their sons. You might have noticed how your mother cares so much for you, more than she cares for me. This family magic will just make her sexually attracted to you. And without any inhibitions, she won't turn lock away her sexual desires for you." James said, shrugging his shoulders. Harry still thought that something was wrong but ignored it. He was going to live his dreams. He was going to touch his mother all over her body without any care.

"Are you ready?" James asked, already knowing the answer.

"Yes." Harry nodded, licking his lips.

"Let's go back now. It is more than ten minutes. When she asks what I have given you, just say that I promised you the latest broom in the market." James suggested. Harry nodded as he wandered back to the living room with his father.

"So? What did he give you?" Lily asked as Harry plopped beside her and put his head in her lap immediately.

"Don't worry. He just promised me the next latest broom. You still are my favorite person." Harry smiled. Lily laughed.

"Seriously, James. A broom?"

"You just wait and watch."

"Sure!" Lily said, not believing him. She leaned down and pressed her lips on Harry's forehead. Her eyes gleamed on triumph.

"He is my Harry. No one can replace me." Lily grinned, massaging his head.

"She is ready. I will leave you to your business. Remember, not her pussy. You can do anything but not bury your cock in her pussy. That is the absolute rule." James said, leading him to the master bedroom. Harry blushed at that. It was quite ridiculous what was happening. He was going to have sex with his mother.

James opened the door and motioned him to enter.

"She will be asleep for at least 10 hours. You can sleep beside her after having done your work. I will come to wake you up in the morning. I will take the guest room. Have fun!" James winked at his son. Harry nodded and entered the room. He closed the door behind him. James walked away to the guest room.

Harry slowly walked towards the bed. He quickly removed his clothes and stood naked beside the bed. He put his clothes and his wand on the bedside table. His breath hitched in his throat at seeing the sleeping form of his mother. She was lying on her back and was just in her bra and panties. Her red hair was spread all around her neck and shoulder. Her ample chest rose and deflated softly with her breathing.

Harry's hand went to his hard rod and he gave it a couple of strokes. He reluctantly sat on the bed, beside her. His hand trembled as he put it on her cheek, cupping it. He loved the feeling of her soft cheek in his palm. His mother didn't react at his touch. Harry sighed in relief. Though he knew that she won't wake up for anything, there was a fear that she would instantly wake up and the potion won't work. He caressed her lips with his thumb. Her red pouty lips were otherworldly. Harry licked his upper lip as he leaned down, towards her face. He kissed her forehead. Then he kissed her cheeks. These weren't the usual kisses. Normally, he wouldn't leave his spit on her face, normally he wouldn't nibble on her cheeks. Normally he wouldn't lick her skin with his tongue.

His lips moved to the corner of her mouth. He closed his eyes and gave a tentative kiss on her lips. It felt as if he was being electrocuted. His whole body was in the state of perpetual excitement. His lips tingled, his fingers tingled. His body was feeling something he had never felt before. He continued kissing her softly on the lips while his hands cupped her cheeks. As the seconds passed, the softness and lightness of the kiss was replaced by passion and eagerness. His kisses were hard enough to leave bruises as he assaulted his mother's lips with his own. He wished his mother was responsive so she could kiss him back but he wasn't going to complain. The things he was doing to her were already good enough. He pulled back after ten minutes when he was satisfied that he had made a proper introduction to her lips, that he was now familiar with every inch of her lips.

"So soft. You have the most beautiful lips, mum." Harry mumbled and gave a last kiss on her lips. He then looked at her D cup breasts. His member sprang up in excitement. Harry again rubbed his shaft for a few seconds.

Her tits were glorious. The black silky bra was snug around her curves. Her upper breasts were naked and the fabric only covered the lower parts of her breasts and her nipples. The bra was translucent enough to give him a sneak peak of her nipples. His mouth watered at the holy sight.

He unsurely put his palms on her boobs.

"Ah!" he moaned at the feeling of her shapely flesh under the silky bra. He gently gave them a squeeze. It was the last straw for him, he couldn't contain his horniness anymore. He tore away the bra, freeing those big supple orbs. The breasts jiggled at the violent treatment, furthermore mesmerizing him with her beauty.

Her areolas and nipples drew his attention. He didn't waste any time being gentle and latched onto her nipple, sucking on it. His lips clamped on her nip, sucking it sensually while his tongue swirled around the nipple. His other hand wasn't idle either, it sank in her other tit, palming her round jug, squeezing it, mauling it, pinching it. When Harry left her nipple, it was red and wet from his slobber. He switched to the other nipple and gave it the same treatment. After that, he dedicated his time kissing every part of her breast. Her mother's body was a temple and every part of it deserved his attention. He kissed her jaw, he kissed the every inch of her neck leaving wet trails of his saliva. Lily was a feast and Harry the hungriest peasant.

He traced her stomach with his lips. Finally, his lips were at the beginning of black lacy panties. He bit his lip as he slowly slid down her panties all the way to her ankle and then removed it from her legs, putting it on the bed. He couldn't help but drool as her hairless pussy came into view. He worshipped her legs. He kissed every inch of legs and thighs. He parted her knees and crashed face first on her pussy. With enthusiasm never seen before, he licked all around her pussy. His tongue was getting sore from all the exercise but he didn't stop. He buried his tongue in her entrance and wiggled it, tasting her womanly juices. When his tongue couldn't work anymore, he used his fingers and slid it in her pussy. Lily in all this was totally unresponsive. The potion worked quite well. She was literally a dead body for ten hours.

He continued finger fucking her. Her body gave a slight spasm and her cum coated his fingers. He put his wet fingers in his mouth and devoured her sweet cum. His cock throbbed painfully and he couldn't wait anymore to climax. He couldn't use her pussy due to the rule and he couldn't use her arse hole because it needed preparation before penetration. So he chose the only hole available to him at that moment. She was still sleeping peacefully as his length loomed over her face.

He grabbed her chin and parted her lips. He pushed his fingers in her mouth and rubbed the inside of it. It was wet with her saliva. He pulled out his fingers and sucked her saliva off his fingers. He then kissed her on the lips lovingly.

"It is your turn to suck me, mom." he mumbled as he went on his knees and elbows over her body. His face was towards her pussy while his rod was looming over her face. He guided his member towards her lips and with the help of his hand entered her mouth.

"Ohh!" Harry moaned as her lips wrapped around his shaft, he gently started moving his hips up and down, fucking her mouth.

"Ahh! Wow. It feels so good." Harry moaned as he with each thrust went deeper in her mouth. He pressed his whole body over hers, his face between her legs as he continued thrusting in her mouth. He was already so turned on that he didn't last much. He pressed his whole length inside her mouth, touching the back of her throat and spurted. Lily unconsciously gulped down her son's spunk. Harry groaned as he pulled out from her mouth and laid beside her, panting. After a minute of rest, he sat up beside her. He checked up on her. She was still fast asleep but her lips were bruised. Harry gently placed his lips on hers and softly kissed her.

"Now it's finally time to claim my birthright." Harry said as he grabbed her shoulder and rolled her over so that she was lying on her stomach.

Harry was still for a moment as he admired her jaw-dropping perfect arse. He was salivating at seeing her plump shapely arse. This was his. It was his at the moment he was born. He traced her curves with his fingers, feeling her firm and big butt. He again parted her legs and sat in between. Her ass was so firm and big that her arsehole was hidden between her voluptuous cheeks. His face went down as if his face and her butt were magnets, pulling each other. He opened his mouth and let his tongue out. He licked her cheeks for a few minutes, coating them with his saliva, worshipping the round wonders.

He placed his palms on both of her arse cheeks, sinking his fingers on her soft flesh and pulled them in two different directions, revealing the dark puckered butthole. He picked his wand from the bedside table. He used the spell his father taught him to clean her rectum. He put his wand back on the table and buried his face in the cleft between her butt cheeks. His tongue shot out and rimmed her arse hole. Few minutes later her hole was wet with his saliva. He pulled his face and caressed the entrance of her arse. He slipped his one finger in. The hole was uncomfortably tight. Even his only one finger was having problems moving in. He continued gently pushing and pulling his finger inside, giving the hole time to get used to it. A minute later, her anus was loose enough to move his one finger easily. So he put two fingers inside, stretching her inside. It was too tight. Harry guessed that his mother never played with her arse hole before. Fifteen minutes was taken just to loosen up her hole. It wasn't really an unpleasant feeling. Harry was quite turned on with finger fucking her arse hole.

When he was able to fit in three fingers easily inside her, he used the lube which was given to him by his father on his finger, coating her insides with lube.

"We are ready. This will bring us closer, mum. I love you." he mumbled as he rubbed the lube on his shaft. He was a little nervous as he lined his throbbing length to her butt hole. He was finally going to do it. He was finally going to fuck his mother. He was finally going to make his wet dreams a reality. The head of his cock slid inside her easily, thanks to the lube. But it was still too tight as he gently pushed his length inside her. Harry was sure that her pussy wasn't this tight. If Harry's dick was a person then it would have gotten a heart attack from claustrophobia. The first few minutes were uncomfortable as her anus took time to get used to his girth.

Harry was above the clouds as his length was sliding in and out of his mother. Her walls were tight and hot around his member. As her hole got used to his shaft, the movement became easier. Harry was moaning as he continued plowing her arse. His balls slammed against her arse at his every push. Harry laid on her back as he got cosy. His face was on her shoulder and his chest was pressed on her back. He had a grin on his face as he was basically bathing in the body heat of his mother. It was a heavenly feeling, the feeling of his skin on hers.

"Mum...mum...mum…" he moaned as his dick was pistoning against her arse. The squelchy sound their coupling made would have been disgusting to others but to him it was a heavenly melody.

"Wait for it, mum. I am near. I am going to cum inside you." Harry gasped on her skin as he rode her. With few more frantic thrusts, he emptied his balls inside her arse, providing her walls with the first of many body fluids. Harry closed his eyes as their bodies were surrounded in the cocoon of golden light when he finished inside her. His sperms disappeared after a moment from her butt hole thanks to magic.

Harry felt his magic intertwining with his mothers. He felt his bond with her increasing. He had a brilliant smile on his face as he rolled down from the top of her body and laid beside her. Her face was still adorably cute as she slept peacefully. He pressed a kiss on her cheek and snuggled to her side.

"Your arse is mine. Haha! I always wanted to say that." Harry laughed delightfully as he wrapped his arm around her waist.

A.N. Hope you enjoyed that. It is just a oneshot now but it may change in future. Please, Please favourite and Follow if you liked it. And I need those thoughts in your mind after reading this story, written in review section. Ciao!