If my math is right, after season 10 would be season 4 of Atlantis so...
I have set this one later in the season after Trio.
Year 11
Christmas proved to be more difficult than Sam had imagined it would be. She missed her family immensely. She pulled out a picture of her and Jack at their wedding. She kept it hidden from everybody else but she was alone in her quarters and therefore also didn't bother to stop the tears. She missed him so much. She looked up to stare at the picture by her bed - The one of SG1 and Cassie from the previous year. She missed all of them. She pulled out her laptop. Writing a few emails to them would help. Her inbox was busy. They must have connected with Earth in the last hour. She scanned the emails searching for non-work related ones. Jack had sent her a Christmas email already. Her heart ached all the more as she read it. God, she missed him. Thankfully, Cassie's email helped. She had sent a lot of pictures of everyone having a good time. There was a selfie of Cassie and Teal'c that had her smiling. One of Vala and Daniel snuggled close on the couch. Guess that was developing well. She wondered, not for the first or last time, if she had made the right decision in coming to Atlantis. It was a wonderful move for her career but hadn't she put that ahead of everything else long enough? Her first goal had been leading SG-1. She had done so for over a year before putting it aside to pursue a relationship with Jack. Only now she was back to putting her career ahead. Jack understood and gave her unconditional support. She wiped her eyes and checked in a mirror to make sure all evidence was gone. Being around other people would help. She walked into the mess, surprised at how it had seemingly transformed by Christmas magic.
"Nice uh?" Jennifer Keller smiled. "Earth sent us a bunch of stuff at the last check-in."
"Some care package." Sam smiled back.
"Oh! I almost forgot. This was for you." She handed her a box with Sam's name on it. Sam smiled knowing who had probably sent it.
"Aren't you going to open it?" Keller asked. "Is it from your mystery guy in DC?" She smiled knowingly.
Sam smiled back. The woman had yet to give up on trying to figure out who it was she was seeing. "Later. What kind of food did they send?"
"Turkey and the works." Colonel Sheppard joined their conversation. "And lemon meringue pie." He said joyfully.
"I know. Can you believe it?" McKay followed, visibly annoyed.
"And a few of these barely edible plants" Ronon joined, holding a mistletoe in disgust.
"You ate one?" Sheppard asked, mildly horrified.
"They're a decoration. People kiss under them." Keller explained, taking it from him. "Like this." She put it above McKay and leaned in for a quick kiss.
Sheppard grabbed it from her. "Alright. That's enough of that. Seeing McKay kiss someone is making me gag."
McKay seemed too shocked to reply.
Sam smiled. She had the beginnings of a family right here. It couldn't compare to the one at home but at least she wasn't alone.
