Sam's nephews, AJ and Cass, were spending the weekend at Sam and Bucky's new apartment. Bucky was a bit nervous because he had never really spent any one-on-one time with the boys without their mother present. Him and Sam's relationship was still pretty new and he wasn't sure if the boys were just being polite around him or if they actually liked him.

"What are you talking about, Buck? AJ and Cass adore you!" Sam replied when Bucky finally voiced his insecurities.

"Really?" Bucky asked hopefully.

"Trust me, hun, if they didn't like you, you would know. My sister's kids are in no way subtle about anything...they get it from their mom." Sam assured him, patting his shoulder.

The door is knocked, so Sam goes to answer it. When he opens the door, he is nearly tackled to the floor by his nephews.

"Hey, guys." Sam said hugging his nephews.

"Hi, Uncle Sam!" both AJ and Cass replied.

Then the boys spot Bucky and plow into him at full speed, catching him off guard and knocking him onto the couch.

"Haha, we got you, Uncle Bucky!" AJ laughed.

Bucky freezes, dumbfounded...this was the first time the boys had used "Uncle" in front of his name. He was so lost in his own head that he didn't notice Cass waving his hand on front of his face.

"Hellooooo, earth to Uncle Bucky! AJ, I think you broke him." Cass said.

"Me!? You tackled him too!" AJ argued.

"Boys! Come give your mama a kiss goodbye." Sarah said.

The boys get off of Bucky and walk over to their mom and each give her a kiss on the cheek. Bucky shakes himself out of his stupor, then stands up off the couch.

"You alright, hun?" Sam asked a little concerned.

"Yeah, yeah, I'm good. It's just...the whole, "Uncle Bucky" thing caught me off guard." Bucky answered.

"See, I told you they liked you. You should really listen to me more often." Sam said giving his boyfriend a side hug.

Bucky chuckles as Sam pulls him closer and presses a kiss to his temple.

"So, what are we gonna do first?" AJ asked.

"You guys are gonna stay here with Uncle Bucky while I go out and get dinner. What do you guys want?" Sam said grabbing his keys and his coat.

"Pizza!" AJ, Cass, and Bucky shout enthusiastically.

"Hahaha, okay. Pizza it is." Sam laughed.

He gives his boyfriend a peck on the lips, then his nephews a pat on the head, then leaves the apartment. When he returns, he finds that the living room had been overtaken by a massive fort constructed out of couch cushions, pillows, blankets, and sheets.

"Hi, Sammy." Bucky said poking his head out of one of the fort's entrances.

"Who's idea was all this?" Sam asked, setting the pizzas on the kitchen counter.

"It was the boys' idea." Bucky replied crawling out of the fort.

"Uncle Sam, isn't our fort awesome?" AJ asked exiting the fort.

"Uncle Bucky set it up where we can see the TV from the fort. Now we can eat our pizza and watch a movie inside the fort!" Cass added, following his brother.

"Well, okay, let's get this pizza party started, shall we?" Sam said.

In the fort, Sam and Bucky sat cuddled up to each other, with AJ at Sam's other side and Cass at Bucky's. They ate their pizza as they watched the Despicable Me trilogy. Then afterwards they had ice cream sundaes for dessert while they played Mario Kart. At some point they all conk out and fall asleep in the fort. In the middle of the night, Sam wakes up with a slight crick in his neck from the uncomfortable position he was in. Although, he couldn't exactly move, for he had Bucky's head on his shoulder, AJ's head on his lap, and Cass's head was on Bucky's lap...if he moved he would disturb their sleep.

"I love you guys." Sam whispered, kissing Bucky's head.

For the entire weekend, the fort stays up and all four of them slept in it every night. And for several days afterwards, Bucky couldn't stop smiling, he was ecstatic that Sam's nephews now call him "Uncle Bucky".