Disclaimer: See chapter one.

Author's note: Sorry for the delay as I mentioned in the last chapter my 'y' key broke off and it was quite difficult to type a chapter efficiently. I have been working on this chapter for a couple of days slowly. I got the replacement keypad today and finished the chapter. I hope it is to your liking. Enjoy!

To Complete a Family

Chapter four: Discovery

What were you thinking?" Her father bellowed the next afternoon when she arrived in his private chambers to speak with him.

Rhian hung her head as her father paced the length of the chambers mumbling about idiotic Gryffindors.

"Dad I had no clue there was a troll in the school until it found its way into the girl's lavatory."

Severus turned sharply on his heel obsidian orbs glared down on her. "And pray tell what were you doing in the bathroom and not at the Halloween feast, hmm?"

"I…I had to go to the bathroom." Rhian replied dumbly finding her boots quite interesting at the moment.

"I'm sure you did child." Her father murmured.

Rhian looked up at her father who looked rather tired. "Dad, I was wondering. Could you tell me about my mum, I don't know anything about her." She ventured knowing her father was in a vulnerable state.

"Rhian, child I don't wish to speak about your mother." He replied tiredly

Sighing Rhian leaned against the mantelpiece. "Dad you never want to talk about her. Can I at least know her name?" she pleaded.

Silence filled the chambers. Rhian knew she wouldn't get anything out of him so she decided to leave. Just as she was opening the door her father spoke.

"Lily…"

Rhian turned to look at her father confusedly. "What?" she asked.

"Her name was Lily." He whispered.

Smiling Rhian left her father's private chambers and hurried down the corridor. Making her way up the several flights of stairs to the Gryffindor tower Rhian had one thought on her mind, her mother's name was Lily.

Giving the Fat Lady the password Rhian made her way into the common room. Harry, Ron and Hermione were sitting in front of the fireplace working on homework. Rhian went over to the couch and plopped down next to Harry.

"Your dad wasn't too mad was he?" Harry asked worriedly.

Rhian rolled her eyes. "Nah" she replied. "He's just being a dad."

Harry still looked worried but didn't push it.

"I'm going upstairs. See you before dinner." She said rising from the couch and headed to the stairs.

Up in the first year girl's dorm Rhian knelt down next to her trunk. Opening the lid she sifted through the items within until she found the piece of parchment she was looking for.

As she got up and sat down on her bed Rhian pulled the curtains closed around her. The parchment in her hand was yellowed with age and felt stiff between her fingers. On the outside of the parchment there was simply her father's name written in an unfamiliar hand.

With great care Rhian carefully opened the letter smoothing out the creases with the palm of her hand. It was a short letter written to her father the year she was born. Scanning the letter Rhian looked to see who had written it. She gasped after a moment seeing her mother's name at the very bottom.

Leaning back against the head board Rhian began to read.

My Dearest Severus,

I hope this letter finds you well. I miss you every day we're apart, but then I remind myself that if you were with us the danger would be too great. I hope Rhian is thriving in your care. Tell her that I miss her and that I love her and you as well.

I have this feeling deep within me that James and I will not live to see the end of this war. Severus I must ask you that if I do not survive that you will take custody of your son. If you don't he will go to my muggle sister, Petunia. Petunia has never liked the magical world and I fear that if Harry goes to her she will neglect him or do harm…

Rhian stopped reading in confusion. Her mother had left her father for another man? She had a brother? This was all confusing. Why hadn't her father told her she had a twin brother? Wait if this man James cared for my twin but wasn't their father and my mother's name was Lily and Lily's sister was Petunia, that meant that my mother was Lily Potter married to James Potter and Harry Potter is my brother…

Rhian put the letter asidetoo overwhelmed to think straight. Her brother was sitting right downstairs with their best friends and they had not known. Her father knew and yet kept the secret from her.

Anger boiled in her blood as Rhian thrust her bed curtains open. Grabbing the letter she stormed downstairs making her way out of the portrait hole.

"Rhian…" A voice called after her as footsteps hurried towards her.

Rhian turned around to find Harry coming up next to her. "What's wrong where are you going?"

Anger ebbed away slowly as Rhian looked in Harry's eyes. "I don't know." She whispered in frustration.

"Let's go for a walk." Harry suggested sensing that she needed to unwind.

Clutching the letter to her chest Rhian followed Harry down the corridor. As they made their way into the library Harry led Rhian to the back where they sat in an alcove.

"When's your birthday Harry?" She asked. "I'm sorry that was out of the blue." She added when she realized how blunt she had been.

Harry shrugged. "It's ok." He replied. "It's July thirty-first." He said.

Rhian smiled. "Mine too." Harry looked shocked.

"Really?" He asked.

"Yup" Rhian replied. "What was your mum's name?" she asked already knowing the answer.

Harry looked at her confusedly not knowing where the line of questioning was going. "Lily" He whispered sadly fiddling with the hem of his robe.

Rhian placed a gentle hand on his arm. "Harry my mother's name was Lily too."

"What?" Harry asked astonished. "That's just weird."

"It gets weirder." Rhian replied. "Lily Potter, your mother gave birth to twins a boy and a girl." She started. "That girl is me." She added softly watching Harry's expression carefully.

Harry's eyes widened in surprise. "But you're a Snape." He replied. "I'm a Potter." He added as an afterthought.

Rhian sighed. "According to this…" She held up the letter. "We are both Snape's but James Potter adopted you as his own."

Harry read the letter carefully, his eyes growing larger and larger. "I don't think anybody knew except my…I mean our dad. I found the letter in his old apprentice book." Rhian sat back against the window. "He doesn't even know that I know." She replied.

From the look on Harry's face he was in a state of shock as he too leaned against the windowsill. "This can't be happening." He whispered over and over softly.

"What are we going to do?" Rhian asked worriedly. "Should we tell him we know or keep it to ourselves?"

Harry shook his head. "I don't know." He replied. "Let's keep it secret for awhile." He added after a moments thought.

Rhian nodded in agreement. After a moment a smile came across her face. "I'm not an only child." A few tears ran down her cheeks. "Harry you're not an orphan." She added her smile widening.

Harry smiled tears streaming down his own cheeks as his emotions took over. Rhian threw her arms around him. The two sat together for awhile talking to each other.

Later as they were walking back to Gryffindor tower a thought occurred to Rhian. "Harry should we tell Hermione and Ron or not?"

Harry thought for a moment. "Only if they keep it completely secret." He replied.

"Password" The Fat Lady said from her portrait.

"Pigs Snout" The twins said in unison.

The Fat Lady nodded as the portrait swung open allowing them into the common room where they were intercepted by a blur of flying curly hair.

"There you two, we were wondering where you got off too." Hermione stated breathlessly.

Rhian and Harry shared a smile. "Hermione, Ron we have something to tell you, in private." Rhian said quietly.

Harry led the way up to the first year dormitory. The four friends sat down on Harry's bed and drew the curtains around them. Hermione pulled her wand out casting a simple privacy charm.

"What's so important?" Ron asked impatiently.

Harry looked at Rhian who nodded. "Hermione, Ron what we're about to tell you must be kept between the four of us." Rhian started. "Promise?"

Both Hermione and Ron promised eager to hear what the two had to say.

"Today I found out that Harry and I are related…"

Ron gasped. "You mean like cousins or something?" He interrupted excitedly.

Hermione laughed and punched Ron lightly on the shoulder. "Don't be stupid Ronald can't you see the resemblance?" she asked a look of knowing crossed her face.

"I don't understand…" Ron said in frustration looking between Rhian and Harry.

Rhian smirked. "Ron, Harry and I are twins."

A look of understanding dawned on Ron's face. "Bloody hell." He whispered looking carefully at the two.

"I see it." He said thoughtfully as he broke out in a grin.

Hermione looked excited. "How did you find out?" She asked. "Did Professor Snape tell you?"

Rhian shook her head no. "Dad doesn't even know I know." Rhian responded. "So please I beg you not to say anything to anybody about this."

"We promise" Ron and Hermione said together, identical blushes donned their faces when they realized they said it at the same time.

Rhian and Harry smiled thankfully. Hermione cancelled the charm and the four ventured downstairs to go eat.

As they entered the Great Hall the twins glanced at each other before glancing up at the Head table where they spotted the Potions Master sitting down at his regular seat. Sitting down at the Gryffindor table they shared a mischievous smile before digging in.

A/N: Sorry it's kind of short but I thought it might be a good place to stop. I hope you enjoyed. Review!