It was a bittersweet moment, knowing it was the last time, but both River and The Doctor were both thankful that they got to see Amy and Rory once more, especially at Christmastime.
And what a wonderful Christmas that was, spending it with one's family.
But still, the TARDIS seemed to mourn with them. The lights were dimmed, and the decorations seemed to sparkle just a bit less.
"It's alright, old girl," The Doctor said with a sigh as he stroked the console, "Everything has to end sometime."
"I'm going to put Freya to bed," River whispered as she rubbed their infant's back. The baby was struggling to keep her heavy eyelids up. She sucked on her pacifier as she nestled into the crook of her mother's neck.
"No, let me do it." The Doctor whispered.
"Alright then," River said. She passed Freya to her husband, who held her gently and lovingly in his arms. He kissed River on the forehead and turned to go down the hallway. "I'll only be a minute."
River smiled weakly as she watched him carry their daughter out of the room. She looked so peaceful in her father's arms, her blonde curls scrunched against his shoulder, her little hand balled up into a fist, her beautiful little eyelashes fluttering.
She looked to the TARDIS console. "Thank you," she whispered before following The Doctor down the hallway.
She paused a moment as she passed by the nursery door. The Doctor was placing their baby into her cot. He bent down to kiss her on the head and whispered something that River couldn't make out. Her heart was warmed by the sight of her husband's affection. She loved both of them so much it hurt sometimes. And this day had reminded her just how much her family meant to her.
An idea occurred to her. Her eyes twinkled mischievously as she slinked silently down the hall to her bedroom.
A short while later, with Freya sound asleep in her cot, The Doctor made his way back to his room. He opened the door, and much to his surprise, he found his wife standing there. She had let her hair down: it curled and caressed her lovely face. But that wasn't all: she was wearing a long, flowing red silk night gown with a plunging neckline that was trimmed with white fluff, like that of a Santa suit. She looked absolutely stunning. He wanted nothing more than to tell her that, but somehow he found himself speechless. She had taken his breath away.
"I wanted to give you one last present. Do you like it?" she whispered alluringly, the smile on her lips widening. The Doctor could feel his hearts beating madly in his chest.
Slowly, River approached him, until she was only inches away from his face. She glanced upwards, and The Doctor followed her gaze: above the door frame, River had hung some mistletoe.
The Doctor chuckled. "Oh you bad girl," he whispered, drawing her in close for a kiss.
River sighed into his mouth as it caressed hers. She felt his arms wrap around her waist, pulling her desperately closer against him.
"Mmmm," she moaned into his mouth, "Merry Christmas."
The Doctor pulled back and stared at his wife in awe. "River Song, you are the absolute best present I could have ever asked for."
He saw her eyes light up: he knew just what she was thinking.
"And, if I remember correctly," The Doctor whispered playfully into her ear, "I still haven't given you your Christmas present either, seeing as we were…interrupted this morning."
River chuckled softly at the notion. "Oh Doctor," she purred, holding up the pair of handcuffs she had given him, "nothing would make me happier."
Yes, he thought, this certainly would be a Christmas he would never forget.