A/N: I like Sven, I'll admit it. So the Sweeper will be taking Iemitsu's place in this story. I love the concept but I don't know how I'd write it. *sweat drop* What are your thoughts, let me know in a review or PM!

Disclaimer: I don't own Katekyo Hitman Reborn or Black Cat.

Son of a Sweeper

Train Heartnet knew it was only a matter of time until his partner settled down with a woman. Everyone had been convinced that he would settle down with Tearju, only to court a woman that seemed to be a normal civilian. Nana was charming and more than meets the eye. The first time that Train met her, Nana had recognized him as the Black Cat and tried shooting him the moment he walked through her doorway.

Nana Oshiro was a government agent, gifted with the ability to infiltrate any environment without attracting any suspicion. Sven was still complaining about the fact that she had a more stable income. "You've always had interesting taste old man." Train teased as Nana went into the kitchen to make some tea. Sven scowled. "Oh shut it. That woman is a goddess in the kitchen and I will kick her ass if you imply otherwise." Of course she's a cook. Train thought with a sweat drop.

"What about the little lady? What does she think about her?" Sven ran a hand through his hair and sighed. "Eve will come around eventually. I think she was upset that I hadn't gotten together with her mother." In a way, it was also like he had rejected Eve herself since she was a clone of the woman. Nana placed a platter of cookies and tea onto the table, smoothing down her skirt as she sat.

"Sven, next time you invite someone formerly on the Most Wanted list into my home... Warn me." She says with a dangerous glint in her eyes. Sven gulped. Not only was the woman a good shot, but she was terrifying when she got her hands on a blade. "Sorry sweetheart." He says gruffly, bringing one of the cups to his mouth. Train looked like a kid in a candy store, stuffing cookies into his mouth. "Have any milk?" He asks innocently.

Two years later and the couple was engaged. On a job Sven felt someone calling his phone and he scowled when he saw the number. He thought that he made it clear that he wanted nothing to do with the family business. "I thought I told you I wanted nothing to do with Vongola." Sven growled, there was a chuckle on the other end. "Can't I just call to congratulate you on your engagement? And I have three sons that can fill my shoes, there's no need for your involvement." Timoteo says in amusement.

Sven's eyes narrowed, there had to be something more to the story. "Cut the bull shit. What do you really want?" He asks bluntly. "I only want your assurance that, should you have any offspring, that they won't try to overthrown my sons." Timoteo says, his jovial tone disappearing. This was Vongola Nono speaking, not Timoteo his godfather. "You won't have to worry about that. I want nothing to do with the mafia."

XoXoXoXoXo

When Tsuna was born, Sven was smitten with the tiny boy. He had spiky brown hair and amber eyes. He was a very friendly baby, just holding the child could calm Sven down whenever he was stressed. Money was tighter since Nana retired and became a stay at home mother to take care of their son. Sven had even seen Eve, now a young woman, smile fondly at Tsuna and ruffle his hair. Train was surprised when he was made Tsuna's godfather, wondering if Sven's brain was functioning properly. Tsuna laughed as Sven chased after Train with his suitcase, trying to swing it at the former assassin.

With Sven's occupation as a Sweeper as well as being a blood relative to the current Vongola don, teaching Tsuna how to defend himself was a top priority. Sven didn't trust Timoteo not to try something while he was out on a job. As Tsuna got older, he proved to be very intuitive and always be the first to lend a hand. Sven wanted to hit his head against a wall when he managed to become friends with a blood thirsty Hibari, finding their game of cat and mouse "fun." The little brat had kicked him in the knee caps and tried throwing a tonfa at his head!

Sven had been out on a job when he had gotten a call from a panicked Nana. "Sven? Some men in suits just came to the house and one is claiming to be your godfather. I've already called the Hibari and I have my service revolver on me. What do you want me to do?" Sven scowled, that infamous Vongola intuition probably told the old geezer when he would be out of town. "He thinks you're a normal civilian so act oblivious. And don't let Tsuna show any flames to the old man, I'll be back as soon as I can."

XoXoXoXoXo

Nana opened the door with a bright smile, only those close to the woman could tell it was a fake. "I'm sorry about the wait, there's been a recent string of burglaries in the neighborhood. Come in Mister Timoteo, I'll make us some tea." Tsuna looked at the old man from behind his mother's legs curiously. The old man looked harmless but there was something about him that was unnerving to the young boy. Timoteo spotted the boy and he gave Tsuna a warm smile. "You must be young Tsuna, I've heard interesting things about you from your father."

Lies. Tsuna thought. His Papa introduced him to uncle Train and aunt Eve, he never spoke about this old man. And from the way Mama was acting, she didn't like him either. He couldn't use his pretty fire, not in front of this stranger. "You know Papa?" Tsuna asks innocently. "Of course, I knew Sven when he was a small boy. He got into all sorts of mischief as a child." He says, noting Tsuna's awestruck expression.

Nana kept a watchful eye on the foreign man, Tsuna sitting on his lap as he told the boy stories of Sven when he was younger. Nana could certainly see where Sven got his suave demeanor from, even if Sven himself might not like the man. The front door opened quietly, and shut without sound. They only realized that someone entered the house when a monotonous voice spoke. "Nana, Tsuna. I was unaware that you had family visiting."

Eve looked almost identical to her creator but had her own personal style. Her long blonde hair was always neat, as was her clothing. Her expression was neutral, her violet eyes observing the scene. Tsuna scrambled from Timoteo's lap and tackled her legs. "Auntie Eve! Did ya bring another book?" He asks excitedly, Timoteo looked at the young woman curiously.

"I see, you must be the young girl that Sven took under his wing. It's nice to finally put a face to your name." Timoteo says with a charming smile. "I don't know enough about you to return the sentiment." Eve says bluntly. Under the watchful eye of Eve and Nana, Tsuna avoided the fate of being sealed that day.

XoXoXoXoXo

Sven slammed his fist against the wall. Dammit, now the old man knew where his family lived! Their latest bounty flinched in fear as Sven scowled. "Train, you still have contact with that fangirl of yours?" Sven asks, Train shrugged. "Last I heard Kyoko was travelling with Charden. I think they're in Romania. I take it we're training the kid earlier than planned then." Sven sighed. "Train, Vongola is in the same league as Chronos. They rule the underworld with an iron fist. He'll get dragged into the mafia, he's like a mini clone of their founder."

Train patted the man on the shoulder. "Don't worry about it, we'll make sure he's ready. Now how are you going to break this news to Nana?" Sven froze, his face turning pale. "That woman is going to kill me!"