(17-years later)...

"Jace, are you and your sister ready?" John Watson called upstairs to his old bedroom.

"No, she's being fussy today, dad. I can't put her diaper on," Jace complained as he came out from the room.

"I'll go and do Hamesha, go help your father down in the kitchen. He might burned the cake," John huffed.

Jace snickered, "of course dad," he replies with a smile as he went downstairs and into the kitchen. "Father, dad told me to help you. Is everything alright?" He asked.

Sherlock rolled his eyes, "I just took out the cake, do you think it's burned?" He asked as he gestured to the cake that was on the table.

Jace looks at the chocolate fudge cake, "we won't know until we taste it," he teased.

Sherlock glares at his son, "thanks for your support," he mutters as Jace laughed.

Jace watches his father as he got the drinks from the fridge and the paper cups, "father, are you going to miss me?" He asked slowly.

Sherlock stopped on what he was doing and turned to look back at him, "of course I will, Jace. It wouldn't be the same," he said.

Jace smiles but his smile turned into a sad one, "I'm sorry that I didn't went to Cambridge University, father. The University of London has great courses there involving what I want to do," he said.

"Whatever you want to do, it's your choice. Even though it involves politics," Sherlock said.

"Uncle Mycroft promised me that he already offered me a job once I'm done with schooling inside the government," Jace said excitedly.

"Why not gone to Oxford University instead? That's where Mycroft went," Sherlock said.

"A lot of people in Oxford University knows Uncle Mycroft, father. I don't want to get special treatment because of that," Jace replies.

"Plus if Jace goes to University of London, Mike Stamford can look after him. He teaches there now," a voice added.

"What happened to St. Bart's?" Sherlock asked surprised.

John shrugged, "He wanted a bigger space," he said.

"Where's Hamisha?" Sherlock asked.

"She's in the room, taking a nap," John replies, "look Sherlock, I need to visit someone for a few hours today..."

"John, my brother and brother-in-law will be here in a few, can't you do it tomorrow?" Sherlock asked.

John shook his head, "it's very important, Sherlock. It won't take the whole day," he said.

Sherlock looked at him, but before he could say anything, Jace was the one who spoke up first. "Father, if dad thinks it's important, I think you should let him go," Jace replies slowly.

"I promise I'll be here before the day ends, Sherlock. I just need to do this. I totally forgotten what day is today until I saw the calendar. I won't miss my son's going away party," John said.

Sherlock frowned, what was today? He thought and he saw that John was waiting for an answer and he nodded. "Just don't leave me alone with Mycroft the whole day, John," he said teasingly.

John smiled, "Molly will be here, as well as my sister and her girlfriend along with Mrs. Hudson and the kids," he said.

Sherlock smiles slightly as he leaned toward to John and whispered, "Tonight, you're making it up to me," he said.

"I will," John promised and the two kissed as Jace made a disgusted face.

Later that day...

"So Sherlock, where's John?" Greg asked as he and Mycroft came into the flat with their baby daughter in Greg's arms.

"John's visiting Mary," Mycroft replied startling Sherlock.

"What?" He asked surprised.

Mycroft looked at him with a raised eyebrow, "Don't you know what's today?" He asked.

"I...I didn't know," Sherlock said slowly as he looks at his niece, "Could I hold Sheridan?" He asked.

Gregory nodded as he gave Sheridan to Sherlock, "Where's Hamisha?" He asked.

"In the living room watching Jace play Zelda: Twilight Princess," Sherlock replies.

"We should say 'hello' before he gets too engross into the game," Gregory said smiling as he pulled Mycroft with him and Sherlock followed.

"You will do fine in University of London, my lad! John and I were there together when we were young lads in the medicine field," Mike Stamford said smiling as the group was in the living rom.

"Speaking of John, where is he? Shouldn't he be back now?" Molly asked worriedly as she looks at Sherlock.

"I'm sure John is coming back by now," Harry replies as Clara nods.

"Have you registered for classes yet, Jace?" Mycroft asked.

Jace nodded, "I have a full time schedule as a freshman," he said grimly.

Mike smiled, "Just be glad that you don't have me as a teacher! I don't play favorites," he said.

"Sure you don't Mike," Harry said teasingly.

"What? I don't!" Mike exclaimed shocked.

"That's not what I hear," Harry replies smirking and Mike glares at her.

"Anyway, no new body parts that I could examine in the morgue, Molly?" Sherlock asked as he came from the kitchen.

"Well, there is..." Molly began but she shifted nervously in her seat.

"But...?" Sherlock asked as he sat down in an empty chair.

Molly didn't want to answer as she shifted her gaze away from Sherlock. Greg smirked, "have some sympathy for poor Molly, Sherlock. You don't want to get her into trouble by blowing up her lab now, do you?" He asked.

"I didn't blow up her lab!" Sherlock exclaimed defensively.

Greg snickered, "That's not what I heard," he said.

"From whom?" Sherlock asked with a raised eyebrow.

"John," Mycroft replies as the two men looked at him.

"What? How'd you know?" Greg asked surprised.

"No, John," Mycroft replies again as he gestures to the entrance to the living room.

Sherlock leaps up to his feet as he went over to his husband, "are you alright?" He asked curiously.

"Yea, why wouldn't I be?" John asked surprised.

"I just wanted to make sure," Sherlock replies.

"Yea, I'm fine. I'm where I want to be," John said and the two kissed and during their kissed, someone snapped a camera as Sherlock broke off the kiss immediately to glare at their audience.

"It's so cute!" Molly gushed out.

"Yea, after 17-years still," Harry replies nodding.

"I should check on Jace and give him his gift," John said and Sherlock nodded as he watches his husband go. Everything is fine and this is what it is to have a family, Sherlock thought as he looked at the surrounding people around him. Sherlock smiles to himself as he sat next to Mycroft as Sherlock and Greg continue to bicker.