The Favor
The following story line is mine. Don't try to copy it cause I'll get mad
In a like vain, Star Trek The Next Generation and all characters are the sole property of someone other than me.

The Cardassians had not, of course, brought any family. They brought down some of their command crew, only another 5 people, to make up the difference. Ambassador Ro had also invited both some Bajoran and human delegates who were stationed on Bajor to help fill in the numbers. None the less, both the Cardassians and the Bajorans were surprised when the Picard family beamed down, all at once. Jean-Luc had thought it better for them to beam down in smaller groups, but Raylyn, who had a thing for dramatic entrances, convinced him to let them all go at once. It was therefore, that the Captain of the Enterprise, his wife, four children, and son-in-law all arrived in the same transportation.
"Welcome, again, Captain" Ro nodded at him. Dar'kon and Nar'Lan joined them.
"Thank you, Ambassador" Jean-Luc replied politely, "My sister-in-law and her family will be joining us shortly" He informed her.
"Your sister-in-law?" Dar'kon demanded.
"Ambassador Troi, her daughter and son-in-law" Jean-Luc clarified.
"I did not know that Ambassador Troi was your sister-in-law, Captain" Ro said. It was obvious that neither did the Cardassians. Jean-Luc nodded, enjoying having put them off balance.
"Oh, yes" he said, "But please, allow me to introduce you to my wife, Dr. Beverly Crusher" Beverly nodded sweetly. Jean-Luc had been right about the uniforms. Both Will and Wyatt had given him dark looks while escorting their respective wives onto the transporter pad. Deanna wore blue and Raylyn the dark green of command, but they both looked stunning in the nicely fit uniforms. Jean-Luc noticed that Deanna's hair was a shade lighter than Raylyn's while they were standing next to each other, both of them with perhaps their best feature spiraling down across their shoulders and down their backs. Their husbands had stood just as close to the women as Jean-Luc stood next to Beverly. But Deanna would not arrive for another few seconds. Only then would all three stunning women be set next to each other for the male fraction of the group to ogle over.
"Dr. Crusher" Ensign...Ambassador Ro nodded pleasantly. The Cardassians both nodded and then turned and joined the rest of their group, which was standing apart from the rest of the party. Jean-Luc would have been offended if he'd cared.
"And my children" he continued as if they were still standing there, "My eldest, Data. He also serves as my Security Chief" A nod from Ro, "My only daughter, Raylyn, my Second Officer, and her husband, William Riker, my First Officer. My sons, Jason and Wesley. Jason works on Kamor Five and Wesley is attending the Academy"
"It is pleasant to meet you all" Ro said with a slight smile, "This is my husband, Lo Dar" A pleasant looking man smiled at them all from just a step behind her. He was tall and broad and dark haired, but he looked kind and gentle. Actually, from only this first glance, the man rather reminded Jean-Luc of Will.
Just then more columns of blue light drew their attention and suddenly Lwaxana was introducing Deanna and Wyatt to Ro.
"I was under the impression that you had children" Ro asked of the two younger women.
"Yes" Deanna bit back a smile.
"They, uh, have a tendency to....attract attention, if you know what I mean" Raylyn tried to explain delicately.
"We left them aboard with our niece, Data's daughter, Laal" Deanna told her.
"I see" Ro nodded as if she knew exactly what they were talking about. The group broke up when Spock, T'auri and the Klingons arrived and Ro went off to greet them. The dinner was a menagerie of dishes from Romulus, Vulcan, the Klingon home world, Bajor, Cardassia and Earth. A small bell had even been provided for the Betazoids as it was there way of giving thanks for the food they ate. (All three of the Betazoid natives were discreet enough to use the bell only minimally for the sake of the rest of the diners)
A musical and theatrical performance was planned for after dinner, but while they waited for the performers to set up they all enjoyed after dinner drinks and attempted to mingle. The Cardassians mainly kept to themselves, but while Jean-Luc was engaged in a discussion with two Bajoran officials, he was glad to notice that a couple of the younger ones, Karchock included, broke away and headed toward the human parties. He tried to listen discreetly while not loosing the thread of his present conversation.
"I am Karchock" the young aid presented himself, "This is Sarkon" He gestured to the young female at his side. A girlfriend, perhaps, interested in meeting one of the strange humans? But they were talking to Data.
"I am Lt. Data" the android man answered, "It is a pleasure to meet you" The conversation faltered for a minute.
"Sarkon is my younger sister" Karchock admitted, "She wanted to meet you"
"I see. I also have a younger sister" Data told him, probably thinking it was best to find something in common to stimulate conversation, "Shall I introduce you?" Sarkon nodded and followed him over to where Raylyn and her two brothers were laughing over something Jean-Luc had a feeling they shouldn't be.
"These are my younger siblings" Data said, "My sister, Raylyn, and my brothers, Jason and Wesley"
"Hello" Raylyn smiled at the two young Cardassians, "Our brother hasn't been boring you, has he?" The Cardassians ignored him.
"I thought you were an android" Karchock said, only slightly rudely.
"That is true" Data answered.
"Then how can you have human siblings?" Karchock demanded as if he'd caught Data in a lie.
"Our father adopted him" Raylyn answered.
"What does 'adopted' mean?" Sarkon asked.
"It means that he took him as his own son. That makes he and his children part of our family" Jason explained.
"You have children?" Karchock asked incredulously, "Is she human too?"
"No. My daughter Laal is also an android. I created her" Data told him. Karchock and Sarkon fell to conversation in their native tongue.
"Why are you considered eldest?" Sarkon wanted to know.
"I was created a year before Raylyn was born" Data said.
"But you have a lower rank" Karchock seemed to want to find anything to prove Data a liar.
"That is true. The planet where I was created was attacked and I was deactivated for a very long time. I have not been in Starfleet quite as long as Raylyn, I therefore am of a lower rank, though technically I am older than she" Data's logical explanation seemed only to rile Karchock more.
"I do not understand how you can accept an artificial being as your brother" He directed his assault at the humans this time. Jason laughed, Wesley just grinned and Raylyn choked on her drink.
"He's not an artificial being" Jason said, "He is a real being, he's just not human. Okay, so he's not biological either, but as the Enterprise has proved many times, not all life is biological"
"Data does all the same things with us that a biological brother would do" Raylyn added.
"Such as?" Sarkon inquired. Her youth was showing through.
"Well, like, he helped me with my homework when I was younger" Wes told her, "And he played games with me. He taught me how to play chess"
"Sometimes we even fight" Raylyn put in, "He can be kinda annoying sometimes" Data raised his eyebrows. This comment, however, seemed to win the Cardassian siblings more so than anything else. They had more questions but Jean-Luc's children seemed to be fielding them very well. The officials he had been talking to excused themselves and so Jean-Luc took just a second to look at his four children all standing next to each other, smiling and laughing. True, two of them weren't technically "his," but he was not surprised to find they felt that way all the same. In many ways Data had always regarded the Captain as a father figure. It was not at all surprising that the android would wish to formalize that relationship for the benefit of his daughter.
"You look pleased with yourself" a sultry voice said from behind him and Jean-Luc didn't bother to turn as his wife slid her arm around his. He nodded at their children.
"Amazing, aren't they?" she whispered.
"Mmm" Jean-Luc responded.
"Ladies and Gentlemen, will you join us for some entertainment?" Ambassador Ro's voice reached over the soft conversations and drew everyone's attention to a set of double doors standing open. Jean-Luc saw Karchock lead his sister back to the group of Cardassians as Will and Wyatt joined their wives and brother-in-laws.
The performance was in its original Bajoran, with translations appearing on screens given to each of the audience. It was a lovely show, proving again what artistic people the Bajorans really were. When it was finished and partings exchanged between each set of delegates, the members of the Enterprise's family returned to their ship with their visiting Ambassador friends.
"An exhausting day" Beverly whistled as she tossed off the all to well fitting dress uniform. Jean-Luc nodded in agreement.
"Mm. And I think.it's the first in what is going to be a long line of them"