Sirius immediately made appointments with Gringotts, the gnomes and an international bank Neither Aurora or Maggie had ever heard of to get all of them tested to see if they had any accounts with them and look for business opportunities to get them all in good financial shape since he didn't intend on 'living poor' so long as he could help it.
The results were interesting, and complicated, Maggie could lay claim to a small Vault from her maternal grandmothers family, only because its previous owner hadn't left a will and no one else had claimed it in so long it had gone into the 'first come first serve' category. By magical law when someone died without a will all their stuff was put into their vault or if they had more than one it was divided up equally and their closest relatives could claim it but if for whatever reason they didn't then after fifty years of being unclaimed the vaults/accounts could be claimed by anyone with a blood relation, they had twenty years for this and if no one had claimed it by then, It became property of whichever magical government that witch or wizard had been a citizen of. Maggie was beyond happy, while the money wasn't a lot compared to what Aurora had, and wasn't even on the same scale as what Sirius had been able to lay claim to, to she had been barely surviving before Aurora came along and had been feeling guilty thinking she was taking advantage of her friend but now had enough to live comfortably so long as she took care and didn't spend too much.
Aurora did have accounts in those banks she hadn't known about. Two from the potters, one from her father Tom Riddle, who had set up a vault for her when she was born and a sum had been paid into it annually ever since. Her Grandma Melania had left everything she had to her daughters daughter. Charis hadn't been able to inherit because she was a concubine, according to law her new 'Husband' Owned her. She could be gifted with money and items but her 'husband' technically owned those too. So old Mel had did what she could to work around the laws, and spite her own husband in the process. With the new accounts under her name and control, She was suddenly much more financially secure, she could once she graduated and made a good name for herself, do whatever made her happy without worrying about working for someone else.
All told Sirius had a large family vault in each bank and a few dozen smaller vaults per bank. He had left rich and gone into ridiculous money by anyone's standard. Except his own, Sirius spent an inordinate amount of time complaining about the state of things and how he'd have to spend the next six months getting it all together and working they way it should. In the mean time he spoke with Maggie about rewarding her for spending so much time and energy healing him when she didn't even know him.
Maggie's Father George Brown was a nasty, immoral, ambitious fellow of no noble or outstanding blood. Though technically a pureblood family the pure part was very recent. His only claim to fame was that he'd convinced his wife to marry him. Marcella Brown nee Rossil, the daughter of a pureblooded business mogul and one of the last surviving Selwyn's, she was beautiful, a true British rose, one that came with a huge dowry. Mr. Brown had been happy to spend his wife's money until her family had cut her off and he'd only had her dowry to rely on, once he'd made heavy inroads in that money as well some of his foreign business deals finally began to pay off in much smaller increments than he'd hoped. So, he sent one daughter, Lavender, off to Hogwarts in the hopes she'd make a good match and give him some more contacts that way. Poor Magenta had been kept and schooled at home, in hopes no one would notice when he sold her off to one of his foreign contacts for more money and a more favorable contract for his company. Newer British laws made it illegal to into a magical daughter into any contract without her permission, boys already had similar laws in place to protect them. The only thing he hadn't counted on was Maggie herself catching wind of what he had planned and booking it. Maggie's great escape had been less harrowing than it sounded but was something she told none the less with great fervor.
She snuck out of her own house in the middle of night and into the neighbors who were known to throw night long parties. From their she had used the floo to her maternal grandparents house, where she begged her grandmother for help. The elder women had given her a diamond necklace to sell and a pearl set with the Selwyn's emblem to keep to help her get an apprenticeship. Maggie had done just that and never looked back. Sirius thought she could do more with her life than sewing clothes and wanted to give her the opportunity. Maggie didn't want to make her fathers family name successful. Sirius had grinned when she admitted that,
"Funny you should mention that. Now imagine for just a second that he wasn't your father, that wouldn't be his name you were using?" Maggie had stare at him in bewilderment until Sirius caved and proposed his plan to her. They would preform two rituals one to emphasize her mothers family in her DNA and one to replace her birth fathers with Sirius She would be adopted into the Black family and could use there resources to do what she wanted with her life. The darts and family tapestry were brought back out to help her pick out a proper name, made harder because Maggie vetoed all Sirius' favorites and Sirius insisted on a traditional Black name in the end though they did manage to agree on Margose so she could still be called 'Maggie' and Cedrilla after her new grandmother. The packet informing Cassiopeia Cedrilla Black about her new son and grandchild was then sent out and Sirius had Aurora and Their combined house elves pull out all the stolen and copied paperwork from Dumbledore and the Order. Sirius wanted to find out where all the stolen children were and inform their parents and the ministry and the many international governments who'd all throw a fit when they found out. It took them days to get through all the information and then send the information out on all but one of the kids, to the right sources. While Sirius was sure there were more children than what they had information on, he figured if people started investigating Dumbledore then most of them would eventually be found they weren't really Sirius' problem, except for the ones related to the Black family that is. They had kept on the files back because Sirius wasn't sure what would happen to the kid in question if the British Ministry were the ones to recover him. It turns out Aurora and a boy child a year older than herself had both been removed from the Lestranges household. The boy Caellum Rodolphus Lestrange had been kept by Dumbledore because of the dwindling number of Lestranges left. He had probable hoped that by controlling the heir if his parents died or were incapacitated he could control their Wizengamot seats as well as parts of their large fortune.
Unfortunately for Dumbledore, once the Lestranges, plus Barty Crouch Jr. attacked the Longbottom's, Augusta Longbottom, Franks mother, had blamed Dumbledore. She had threatened to go to the press if Dumbledore didn't do something to help her keep the Longbottom Wizengamot seat and family home. Augusta had married into the Longbottom family from a rather poor one, without the Longbottom money and influence Augusta would not be able to live the lifestyle she was very much accustomed to, plus she had lost her only son. Dumbledore to keep her happy had used Franks blood in a ritual to add Longbottom blood to Caellum to make him the new heir, spelled him in much the same manner he had Aurora then turned the child over to Augusta in an attempt to appease her, loosing the Lestrange connections for himself in the process.
Sirius wanted Caellum (he refused to use any other name for the child) 'home'. He couldn't live with his parents they still had to heal from their time in Azkaban and he couldn't be handed over to the ministry for fear that they might use him against his true family. Sirius was the closest sanest relative besides Narcissa whose husband wasn't trustworthy, and Andromeda who'd been disowned and was therefore no longer trustworthy. After talking it out again and again; they argued that he might not want to be rescued, the girls conceded to Sirius' wishes and hatched a plan to kidnap their cousin from his kidnappers.
They used the house elves to do a bit reconnaissance for them. Longbottom hall was too well defended, they would have to get Neville "Caellum" Sirius corrected, somewhere outside of those wards. Ideally they could get him at kings cross but Sirius thought it might be too well defended after 'Harry's' disappearance. Maggie suggested using a time turner and getting him before he left the station. But even if they had one already recharged Sirius vetoed the idea on the grounds that he didn't want Aurora to get time sickness she was already at risk. Besides there were other ways to manipulate, though not travel back in time, that didn't carry such risks. Sirius said he would teach them later. So instead they would get him while he was school shopping the ministry and the board of governor's had orchestrated a day for students to shop safely in the Alley all law enforcement agents would be on duty to make sure nothing went wrong. Of course that meant they were all on the look out for death eaters and no one else. But still kidnapping some one in that environment wasn't going to be easy.
Aurora used her contacts with the broom racing company to get them to agree with an advertising stunt in Diagon Alley on the safest day there was. She assured them that the Law would be there and so would most of the kids who went to Hogwarts. It would be as safe as it could be still just in case the company would send everyone going with portkeys. Most of the racers going were girls and pretty French girls at that. They set up stalls to sell brooms and accessories, and memorabilia for the racers. They racing girls flirted and signed autographs and played around with everyone.
Aurora placed a special lipstick in her pocket, it was laced with a mild sleeping agent and would make any one who came in contact with it temporarily confused. She of course was already protected from it. So when she spotted Neville in the crowd she applied the special lipstick same shade she was already wearing, she had done something similar to what she was preparing to do several times already so this wouldn't look suspicious. Then she moved herself through the crowd waving a small goodie bag she would be giving away for free. Turning her body she 'accidently' ran right into Neville. The poor boy took one look at her smile and slightly revealing attire and turned bright red. She grinned wider, and yelled for all to hear
"Looks like we have a new lucky winner!" the people around cheered, Mrs. Longbottom looked deeply disapproving.
"I'm sssorry, really!" poor Neville stammered.
"It's ok, here its free for you." Aurora gestured toward the bag and its extra long string,
"He'll only lose it" The old bat beside him stated. Aurora didn't even have to pretend not to take offence several of the crowd did as well. So she simply gave Neville a wide smile and gestured for him to come closer.
She opened the string put it around his head like a necklace used it to pull him even closer and planted a kiss on his cheek very close to his mouth. "There you go honey, you won't lose it now will you" and if the boy looked a little dazed well no one blamed him.
Maggie waited nearby looking for the perfect moment. Thinks to Auroras brining attention to them many of Mrs. Longbottom's friends and acquaintances' spotted her and as they were moving away from the racing stall they waved her down and began to talk. Seeing her opportunity, Maggie used her hips to shove Neville off away from his grandmother the spells in the lipstick did the rest as Neville wondered off.
Sirius waited until the disguised Caellum got close enough to his relatively deserted alley way, then grabbed his cousins arm, and guided the confused boy down the alley, yelling loudly about how he was too young to go off drinking and pining after girls. This particular alley had been chosen because of an old exit towards the muggle side once passed the alleys wards Sirius activated an illegal Black portkey and whisked them both away.