Alvin and Brittany were cuddled next to each other watching TV.

"Alvin, Brittany!" Dave exclaimed coming upstairs.

Alvin sighed. "What!" He exclaimed.

He came in. "You guys need to get dressed. Alvin your family should be here in an hour." He reminded him.

Alvin groaned. Claire was making him wear formal clothes. Toby ran in seconds later. He was wearing a yellow plaid long-sleeve shirt, and black trousers. His thick hair was slicked back, and had a pair of black loafers on.

"Claire says I have to wear a TIE!" Toby exclaimed overly annoyed.

"Yay." Brittany said not caring.

"He wants to look extra nice since Claire invited Julie over." Alvin explained grinning.

"I do not!" He exclaimed all of the sudden angry. "I wanna look good for the Miller sisters. Especially Brittany." He said with a wink as he blew her a kiss.

"Watch it pipsqueak." Alvin said sternly as he and Brittany got off the bed.

Toby chuckled and ran off.

Simon and Theodore then came through the door all dressed up in their suits.

Simon was wearing a blue plaid long-sleeved shirt and black trousers. His thick her hair was normally slicked back so it wasn't a problem for him to do that for the party. And had his black loafers on too.

Theodore was wearing a green plaid long-sleeved shirt and black trousers. His thick hair was slicked back and had his black loafers on too.

"You look great in your suit Alvin." Simon smirked at him knowing fully well that he hates wearing suits. Alvin claims it's just 'not his style'.

"Whatever Simon. You boys are looking good too. Who you getting dressed up for? Is it for Jeanette and Eleanor?" Alvin teased them as he watched their faces go red and mutter something under their breath before leaving his room.

Brittany rolled her eyes. "Who should get dressed first?" She asked as she placed her hands on his chest.

Alvin smirked and wrapped his arms around her. "We could always get changed at the same time." He said with a flirty tone.

"I don't think so." Claire said as she walked by.

They both laughed and Alvin left her alone to change. He walked downstairs and watched Dave and Claire frantically run back and forth getting everything ready.

The house was beyond decorated. Decorations covered walls, paper snowflakes hanging form the ceiling, that shiny tickly stuff that Alvin could never remember the name of. Didn't it start with a G?

The tree stood tall and shimmered colorful lights. The ornaments topped it off, along with the shiny star on the top.

He heard footsteps walking into the room and looked up to see Eleanor and Jeanette dressed up in their dresses looking all Christmasy.

Eleanor was wearing her red dress with a dear on it. She also had a head band that looked like a dear's ears on her head. She also wore black high heels on.

Jeanette was wearing a red top and white shorts with red stripes on. She had black heels on too and was wearing a red Christmas hat and a red scarf.

"Hey, you girls look great." He told them smiling at the sight of them.

"Thanks Alvin." They smiled cheerfully at him.

"Have you seen Theodore or Simon anywhere?" Eleanor asked him.

He thought for a second. "Uh, I think they could be up in their rooms right now." He guessed.

They nodded. "Thanks again Alvin." They thanked him once more before going back up the stairs to see them.

Alvin sighed and looked around the house again.

There was a table covered with bowls and platters of snacks. There was a drink table, and there were even Christmas balloons.

"Don't mind if I do." Alvin said with a smile once he spotted a platter of glazed donuts.

He was about to grab one when Claire shouted from across the room, "NO!"

Alvin flinched and pulled his hand away instantly.

"Why aren't you dressed yet?" She exclaimed frustrated. She or Dave always got stressed when they host a party.

"Brittany is still getting dressed." He informed her.

"Right, I'm sorry, I'm just…"

"Stressed?" He finished for her.

"Yeah." She said massaging her temples.

"Why isn't Dave and Toby helping you?" He questioned.

"Dave's in his room getting dressed and as for Toby...well, let's just say a football game was on TV and he begged me to watch it for a few minutes. Which in Toby time is probably one or two hours." She said as-a-matter-of-fact.

"Ah." He said snatching up a doughnut and shoving it in his mouth.

"Alvin!" She exclaimed playfully as she swatted him with the newspaper.

Alvin laughed and ran upstairs to check on Brittany. He went and knocked on his door. "Brittany, you in there?"

There was no answer. "Brittany!" He called through the door starting to panic a little.

He swung the door open and looked around. She was nowhere to be found.

"BRITTANY!" He called out.

Alvin ran to Theodore's room. "Hey Theo, have you seen—Brittany?" He was befuddled when he saw Brittany and Eleanor sitting on Theodore's bed with their phones out while Simon and Jeanette were helping him with his homework. Alvin ran his fingers through his hair and sighed.

"Hey." She said smiling as she stood up.

Claire had gotten Brittany a dark red dress, with a black bow around the waist. It also came with lacy black finger-less gloves.

She had her spider web tights, and black high heels. She was breathtaking in Alvin's eyes…and Toby's. Well, all three of the girls were in Toby's eyes.

"You look great, babe." He complimented her and gave her kiss on the lips.

"Thanks. Aren't you going to get dressed too?" She asked him.

He nodded. "Yeah. I'll see you when I finish." He told her and gave her another peck and left the room quickly to change.

After Alvin finished getting dressed and came back for Brittany. Claire made all of them, including Dave, come downstairs. Grandma and Grandpa would be there any minute.

Alvin held Brittany's hand. Brittany was a bit nervous to meet so many unfamiliar people and could tell Eleanor and Jeanette were too as they held Theodore and Simon's hands in theirs too.

All three of them flinched when the doorbell rang. Kane started yapping at the door viciously. Claire lightly pushed him away with were foot and opened the door.

"GRANDMA, GRANDPA!" Toby screamed as he attacked them with hugs. Dave and Claire gave them hugs.

The boys's grandma staggered over to Alvin and threw her dainty arms around him. "Hey Grandma." He greeted as he cautiously hugged her.

She hugged Simon and Theodore too and they also hugged back cautiously too. "Hey Grandma." They also greeted.

She was a frail little woman. "And who is this?" She said glancing at the girls.

"Uh, this is my best friend, Jeanette and her sisters Eleanor and Brittany who is dating Alvin." Simon said politely. Their grandma was known to be critical.

"Why do you girls look like a Barbie doll?" She exclaimed with a scowl.

"Why are you so old?" Brittany shot back defending herself and her sisters.

"You whores." She snapped at them.

"Mother!" Claire exclaimed. "Be nice to these girls!" She exclaimed.

"I'm sorry." Alvin whispered to them.

They just shook their heads. "It's okay." Brittany said honestly. They had learnt to not care about what other people had to say about them.

Claire demanded that Alvin, Brittany, Simon, Theodore, Jeanette and Eleanor wait by the door while she and Dave chatted with their grandparents.

More of their relatives flooded in after an hour or so. They all wandered the house, catching up with each other. It was a calm social get together, was how Claire had explained it.

The chipmunks other soon-to-be grandparents when Dave and Claire marry, approached them and the chipettes, including Toby. Claire's parents.

"Oooh, Theodore, look at you." His grandma said as she squeezed his cheeks. "You're getting to be a big boy?" She said in a baby voice.

"Hey grandma." Simon greeted her.

"Oh, Simon! The other big boy! Oh, you're so grown up!" She gushed as she pinched his cheeks too.

"Hi grandma." Alvin said awkwardly.

"Alvin!" She exclaimed as she pinched his cheeks into a painful grip.

"Ow…Grandma…you're hurting me." She said as her nails started digging into his flesh.

She let go and looked at the chipettes.

"Who are these beautiful ladies?" She exclaimed grabbing both of Brittany's hands first.

"This is my girlfriend, Brittany." Alvin said proudly.

"Hi Mrs. Wilson. It's very nice to meet you." Brittany said politely.

Alvin's grandma cooed as she pinched Brittany's cheeks as well.

Alvin immediately pulled his grand mother away from Brittany before Brittany put her in a hospital.

His grandma did the same thing to Eleanor and Jeanette.

"Ah, Alice!" His grandpa exclaimed poking him with his cane.

"Still Alvin, not Alice." Alvin corrected. His grandfather had been in a car accident, and now he was 100% sure that Alvin was a girl.

"Theresa! Simmone!" He exclaimed poking Theodore and Simon with the cane as well.

"I'm Theodore!" Theodore exclaimed.

"And I'm Simon!" Simon said annoyed.

"Uh, Grandpa, this is my girlfriend Brittany and her sisters, Eleanor and Jeanette. Brittany, Eleanor and Jeanette this is my grandpa." Alvin introduced.

"Alice, I didn't know you were a lesbian!" His grandpas exclaimed confused.

Alvin held the bridge of his nose. "Yeah, anyway, this is Brittany." He tried again.

"Nice to meet you Brett, Ethan, Jack." The old man said as he poked them with the cane.

The chipettes didn't know what to say, they were too busy trying not to laugh right now.

"Uh, Simon, Alvin?" Theodore asked tugging on their shirts.

"Yeah?" They asked looking at him.

"What's a lesbian?" He asked curiously.

The girls choked on their punch as Alvin and Simon's eyes widened.

"Uhh, it's nothing." Simon said shaking his head.

"But Grandpa said Alvin was a lesbian." He said confused.

"Uhh…" Alvin started.

"So, are you a lesbian, Alvin?" He questioned.

"Sure?" Alvin asked hoping he would drop it.

He ran into the living room where most of his relatives screaming, "DAVE, CLAIRE, ALVIN'S A LESBIAN!"

Brittany, Eleanor, Jeanette and Simon burst out laughing. Alvin shook his head and led Brittany somewhere else. She was still laughing hysterically. Alvin chuckled a little bit too, it was a little funny that Theodore was so clueless.

He believed pretty much anything.

"ALVIN!" Two little identical girls exclaimed as they ran up and jumped into Alvin's arms.

"Hey guys!" He exclaimed happily.

"Brittany, these are my twin cousins, Ally and Callie." Alvin said as Brittany looked at the little girls in amazement. Their hair was the same color as hers, and they had blue eyes just like hers.

"Hi guys, you're very adorable." She said with a heart-filled smile. "How old are they?" She asked Alvin.

"7." He replied.

"Ally, Callie, this is my girlfriend Brittany." He said full of pride.

"You're very pretty." Ally said while Callie sucked on her thumb.

Brittany had never felt loved by anyone but her own family, she loved the Seville family. "Thank you." She said kissing her on the cheek.

Ally smiled and blushed a little as she twirled one of her pigtails.

"Did you say hello to your cousins Simon and Theodore?" Alvin checked.

They nodded happily. "Yeah, we did!" Callie said giggling.

"Good." Alvin let them down. "Go play." He said as they ran off.

"They're so adorable." Brittany said still dazed.

"Well, I didn't know that the cold-hearted diva Brittany Miller liked children." He said as he put his hands on her waist.

She gave him a flirty look as he pulled her a little closer and placed a kiss on her lips. Alvin pulled away and looked around. There was no one watching them in particular.

Once they were sure no one was watching, Alvin grabbed her hand and led her upstairs. They went to his room and Alvin got over top of her. Alvin pressed his lips against hers. The kiss started off calm and passionate, but soon it grew more vigorous.

Brittany reached for the buttons on his tux and yanked it open and the buttons flew off and fell to the floor. She removed the tux jacket without breaking the kiss.

Alvin sat them up, and pulled the dress over her head revealing her black lacy bra and panties. Alvin hungrily continued the kiss, pushing his tongue passed her lips and their tongues danced.

Brittany pulled off the plaid shirt revealing his breathtaking abs. Alvin moved his lips down to her neck, nipping and kissing her soft skin. She moaned as his teeth grazed her skin.

The sounds of her moans made Alvin grow hard. She arched up as he reached behind her back, without moving his mouth, and unclasped her bra. He grabbed it and threw it across the room.

He slowly trailed his tongue down her neck. Once it close to one of her breast, he would retreat. This tortured Brittany, but she loved it.

He trailed back down and took one of her nipples in his mouth. Flicking over it with his tongue, nibbling at it, making her moan in ecstasy.

"Oh my god, Alvin." She moaned with her eyes closed.

Alvin placed his hand on her waist, making her wince from the coldness of his hand. He slowly moved his hand down her waist. He ran his hand over her clothed wet core making her shudder with pleasure. He moved his mouth over to the neglected breast, and did the same procedure.

He lightly massaged her core over her panties. She moaned out his name, wanting him.

He slowly pulled the panties off. He went back up to her breast and started kissing her softly. He kissed down her whole body.

She moaned out his name again. This was torture for her. But both of them enjoyed it a lot.

He teased the outside of her core with his tongue. She tasted sweet, just like he had imagined…wow that sounded really weird.

He slid his tongue inside of her moan his name a little louder.

He slid his tongue in and out of her faster, tasting her, making her scream his name. He stopped and shushed her with a chuckle. She covered her mouth and whispered, "Sorry."

Alvin chuckled and slid a finger into her. One finger first, then two, and then he managed three pushing her over the edge. Right before she could release, he pulled his fingers out of her.

She looked up at him confused. She immediately got it when he pulled off his pants and his boxers.

She gave him a sexy smile and laid back. He reached under the mattress and pulled out a condom. He slid it on, and slowly inserted himself into her. It was their first time, so he was cautious.

She moaned out in ecstasy. After going slow long enough for her to get used to it, he quickened the pace. He grabbed her hips as he pulled all the way out every time before slamming himself back in.

With all of her screaming, Alvin was surprised that no one heard them. He was surprised he got away with this at a Christmas party.

They both reached their orgasms at the same time. Panting, Alvin pulled off the condom and threw it in the trash. He collapsed on the bed next to Brittany. She was panting too.

She rolled over and got on top of Alvin. She smiled and looked into his eyes.

Alvin smiled and looked over to see Theodore standing there in utter shock.

He turned on his heals and ran down the stairs screaming, "DAVE! CLAIRE! ALVIN AND BRITTANY ARE DOING DISHES!"

XD I really liked this chapter. SO yeah, I definitely have to change the rating now xD. I like Alvin's family, aren't they wonderful :) I love Theodore so much, he's a really fun character to work with. Make sure you REVIEW!