A/N: Hello again, everyone!

Disclaimer: I don't own Criminal Minds.

Because I stupidly forgot about Reid's first Father's Day with Séraphine when I first started writing Book 2, I was inspired to create a missing chapter along with some missing scenes. Unfortunately, I don't own Criminal Minds.

My apologies if I had made any mistakes but enjoy the chapter!

PS: (whispering) I have a special (and surprise) guest (or two) who is set to return in this chapter because I figure this chapter can't be included without them.

"Aw…" Reid gushed at Séraphine being able to sit upright and adequately hold her head. "Look at you." Taking pictures of her with his silver camera. Squatting down in front of her, "What do you plan to do now? Do a push-up for me?" He mimics a deep masculine voice, almost impersonating Morgan, "My little bodybuilder."

Séraphine let out this loud gurgle-filled laughter as she looked at Reid, making him laugh as well. Soon Opal woke up from her nap and immediately walked over to lick Reid's cheek before sniffing Séraphine and licking her, releasing her joyful baby laugh and for Reid to capture it with his camera.

"You just love to lick, don't you?" Reid patted Opal's head just as the front door opened. Reid turned to see,

"Honey!"

Élise exhaled as she entered the house, placing her briefcase aside and moving a piece of her chin-length hair behind her ear. Élise smiles once she saw Reid playing with Séraphine and Opal.

"Hello, darlings."

Reid grinned, "How are you doing?"

"Good." Élise opened the door again, "I have a surprise for you." Gesturing the person to come inside now. "Come on in."

"Hi!"

Jack dashed into the house with Jessica trailing behind, carrying two bags with her. Reid's eyes widen when he saw Jack,

"Hi, little man."

Jack hugged Reid and noticed Séraphine, waving to her, "Hi-hi, Fifi."

Séraphine beamed at the sight of Jack.

Jack stroked down on Opal's fur, "Hi, Opie."

Opal licked Jack's cheek. Placing his hand over it, "Aw. I miss you, too, O-pal."

Élise and Jessica simpered at this beautiful moment. Jessica licked her lips together before telling Élise as she had her Jack's bags, "And thank you two for watching him for me this weekend. I know this upcoming Sunday is Father's Day and with Aaron in Pakistan, but I…"

Élise understood the situation, "Spen and I totally get it."

Jessica smiled again as she gave her a warm hug, "Oh, thank you." Jessica soon hugs Jack, "Mmm. Be good for Élise and Spencer, okay?"

Jack obediently nodded his head, "Okay."

Jessica looked at Jack deep in the eyes, "I promise to call you as much as I can, okay?"

"I'll be back Monday morning." Jessica ruffled his hair before blowing a kiss, "Goodbye-bye."

"Bye." Everyone waved Jessica goodbye and watched her take off in her car. Turning their attention back to Jack,

"So, Apple Jacks..." Élise placed her hands on her knees and asked, "What do you want to do?"

Jack simply asked, "May I play with Fifi, please?"

"Of course, you can," Reid answered before offering, "Maybe we could order a pizza and watch a movie as well?"

Jack excitedly jumped up and down, "Yay!"

"I'll order the pizza," Élise pulled out her cell phone, "And perhaps we could watch…"

Almost dropping her phone, Élise's jaw gaped and gasped before a grin broad on her face, eagerly pointing her finger in the direction where she was pointing to, "Spencer, look!"

Reid gasped as well when he realized, "Fifi! You're…you're…"

Élise completed Reid's sentence for him, "You're crawling."

Reid frantically turned on the video button on his camera, "Actually, she's scooting, which is an almost borderline baby crawling but yeah!" Reid could feel a lump developing in his throat and his eyes getting murky. "You go, Fifi!"

Jack cheered, "Woo-hoo, Fifi!"

"Okay," Reid was getting Jack into bed; Élise had just finished bathing Séraphine just as he set up a little surprise for him. "And…here we go." Giving Jack a tablet,

"Hi, buddy."

Jack's face lit up, and he smiled, "Daddy!"

"How are you?"

"Good."

Hotch noticed Reid in the background as he sat next to Jack, "Hey, Reid."

"Hey." Reid waved to Hotch. "How's it like overseas?"

"Ah, it's hot and dry, but I'm used to it." Hotch replied before asking him, "How's being a stay-at-home dad?"

Reid was delightfully happy, "Everything's going well; Élise loves being Mama Bear."

"And you're Papa Wolf?" Hotch teased, making Reid and Jack laugh.

"Yeah, I'm Papa Wolf." Reid's laughter eased down before showing him a video of Séraphine scooting for the first time. "Look here."

"Aw," Hotch grinned. "And pretty soon, she'll be crawling, then toddling, walking. Well, that's wonderful." Now Hotch's voice became somber. "Jack, I'm sorry I won't be able to be there with you for Father's Day this weekend. I know, but…"

"That's okay," Jack was understanding, shrugging his shoulders before placing his hand on Reid's shoulder, "I have Uncle Spencer with me."

"I'll try as much as I possibly can to communicate with you. Even if I'm 10 hours ahead of you."

Reid replied, "It's almost eight o'clock here, and it's six in the morning over there."

"Thank you for proving my point." Hotch comments before he looked down at his watch, "I have to get going since I have a big meeting, so…good night, buddy."

"I love you, dad." Jack cried, waving to him.

Hotch softly smirked, "I love you, too."

Jack blew a kiss to him before the Skype call ended. Handing the tablet back to Reid,

"Okay, you." Reid tucked the comforters over Jack a little bit more before turning off the main light for the nightlight. "Good night."

"Night!"

"Okay," Élise walked out of the kitchen with a large bowl of freshly popped popcorn and a small walkie-talkie. "Popcorn's ready. And Fifi's taking her nap right now," She joined Reid and Jack on the couch; Opal joined them as well.

"Which movie, Jack?" Reid held up two movie DVDs in his hands, "Toy Story or Up?"

Jack picked, "Up, please!"

"Okay," Reid set up the DVD players while Élise asked Jack,

"So, Jack-Jack," Élise place her arm around him. "What do you want to do for Father's Day?"

Jack shrugged his shoulders, "I don't know. Daddy's not here to celebrate with me."

"Aw," Élise's head downturned, ruffling his hair, "It's alright, little guy. I know it can be hard, but you know your dad loves you more than any time in this entire galaxy."

Jack somberly questioned, "Like mommy, too?"

Both Reid and Élise's eyes widened when Jack mentioned Haley. "Yeah, like mommy too. Your mommy's looking out for you and your dad right now."

Reid had just finished setting up the DVD player and took a seat next to Jack on the couch. "Hey, uh…there are still some fun activities we can do while your dad's overseas."

Jack looked to the two with his big and curious eyes, "Like what?"

Reid moved his shoulders, "What do you and your dad do for Father's Day?"

"Play," Jack said, fiddling with his fingers. "Watch TV and movies. Talk about mommy."

Élise massaged his shoulders, "We can do that for you."

"Really?" Jack's face glowed up and held it high. His eyes flashed, and pupils dilated. "You'd do that for me?"

"Of course." Élise smiled. "We're going to take good care of you."

Jack bounced up and down on the couch, "Oh, thank you!" He hugs them.

"Anytime, buddy."

Reid groaned as he was starting to wake up. He blinked his eyes a few more times and rubbed them. Using his closed fist to cover his mouth, yawning, he soon noticed Élise wasn't in bed with him. Pulling the comforters to the side, he gave his legs a good shake to wake them up before walking into the closet and bathroom, and Élise wasn't there either.

Walking out of the bedroom, he was just about to check in on Jack and Séraphine before his nose caught a whiff of something.

Following that sniff to the kitchen...

"Happy Father's Day!"

Jack took a Polaroid of Reid's surprised face as Élise was carrying Séraphine.

"Oh!" His eyes twinkled, and he flashed a smile. "What a nice surprise!"

Élise giggled, "Well, look at this surprise!"

Reid's jaw cracked open, and his eyes broaden when he saw Séraphine wearing a purple onesie with a picture of him and her from the first time Reid held Séraphine in his arms.

"Oh!" Smooching her face. "Don't you look pretty?"

Jack handed the Polaroid picture he just took of Reid to him, "Here you go."

"Aw, thank you, Jack." Reid hugged him before the two of them sat down with their plates in front of them. He soon asked Élise, who was placing Séraphine in her swing. "Wow. What a meal you cooked here."

Reid's plate contained a Belgian blueberry waffle, a chocolate chip pancake, an Eggs Benedict, mixed fruit, two bacon strips, a slice of coffee cake, and a big chocolate donut with sprinkles. "Thank you very much, lovely." Reid kisses Élise's lips.

"Anytime, sweetness." Élise cheekily smiled.

"Mmm," Jack licked his lips after eating a spoonful of oatmeal. "Thank you for this oatmeal."

"Of course, kid-o!" Élise petted Jack on his head. "I know it's not like how your old man, Auntie Jessica, or mother would make it, but I'll glad you like it."

Jack shook his head; his mouth was full before helping himself to some orange juice. Élise sat down at the table and ate a bacon strip when Reid asked,

"Hey, Jack. Would you like to watch a movie lately after breakfast?"

"Can we do it after I talk to my dad, please?" Jack politely asked.

"Of course." Reid agreed before sipping some orange juice. "There's plenty of things we can do for Father's Day."

After everyone had their breakfast, while Élise gave Séraphine a quick bath and changed her diaper, Reid sets up the Skype videocall for Jack; and now they've been talking the past hour and a half.

Hotch heavily sighed, "I'm so sorry again I can't be with you today."

"I made you a picture for Father's Day." Jack shows his father a colorful drawn picture. "To make you feel better today, so you'll be here with me in spirit." Jack pointed to the people in his drawing. "That's you. And me. and that's mommy right there."

Reid could see Hotch was absolutely touched by the drawing Jack drew. He could even see a tear falling from Hotch's eye and his mouth wobbling, breathlessly telling him, "Aw. It's so beautiful."

"Thank you, daddy." Jack giggled.

Hotch asked Reid, "So, what do you guys have planned today?"

Reid answered, "Watch some movies, maybe go bowling or the park and play."

"Sounds like you guys have a very busy ahead of you, huh?" Hotch chuckled before a yawn escaped him, "I have to get going, buddy. We'll talk more today, and you can tell me how your day went, okay?"

"Okay, daddy." Jack waved. "I love you."

"I love you, too."

After their video call ended, Jack gave Reid back the tablet and sighed, staring blankly at the comforters. Comforting Jack,

"Hey," Reid used his hand to lift Jack's head gently. "I meant what I said. We're going to do some fun things today."

"Can we get started right now?" Jack openly asked.

Reid chuckled, "Let the fun begin."

Reid and Jack took their showers within the next thirty minutes, brushed their teeth, colored, and watched The Lion King movie. Reid and Jack headed out to the backyard for some more Father's Day fun.

"Okay, buddy." Reid and Jack were now working on a little project. They were making a volcano using 10 ml of dish soap, 100 ml of cold water, 400 ml of white vinegar, food coloring, baking soda, and an empty 2-liter soda bottle, "Combine the vinegar."

Jack fiddled with the red goggles, "Added the vinegar."

"Next on the list: add the water." Reid handed Jack the 100 ml bottle of water for him to put in the 2-liter soda bottle.

Jack added the water, "Water in."

"Dish soap."

"Check." Jack poured the dishwater in.

"And food coloring," Reid gently added two drops of red food coloring. "Let's not forget the food coloring."

Jack asked, "Why do we need food coloring? It's not like we're going to drink it."

Giggling, Reid answered, "To give our experiment some color. You don't want it to be bland, do you?"

He soon gave Jack a spoon to mix in the baking soda. "And…we'll stir until it's liquid and…now…"

"What's next?"

"Baking soda!" After Reid quickly poured in the baking soda slurry in the soda bottle, he pulls Jack away and watched for it to erupt.

"It's gonna blow!" Jack cried, clutching his goggles.

And soon, a giant soapy bubble erupted from the soda water.

"Cool!" Jack exclaimed; some of the red 'lava' got on his clothes, jumping up and down. "How did that happen?"

Reid explained, taking off his goggles, "A chemical reaction with the vinegar and the baking soda created carbon dioxide. It's a gas that is used to make carbonated soda."

"Ooh!" With a sparkle in his eyes, "Can we do it again, please?"

Before Reid could answer Jack's question, Élise walked into the backyard and said,

"Come on in, boys." Élise cried, waving her arms for Reid and Jack to come in. "It's lunchtime."

As they walked inside, Reid patted Jack on his shoulder and said to him, "Let's go inside and eat, and maybe we'll do another one, okay."

Jack shook his head, "Okay."

Reid and Jack walked in with a taco bar on the kitchen counters, from mixed vegetables to seasoned ground beef and pulled chicken, soft and hard tortillas, salsa, and cheese. Élise sat at the table, eating a soft veggie taco as she was cradling Séraphine in her baby wrap.

Reid asked Jack, "Would you like me to help you make a taco?"

Jack looked up and answered him, "Yes?"

Élise took another bite of her taco before looking down to Séraphine, softly cooing. Élise giggled and gently tapped her nose and kisses her face. Reid set his plate down and kisses Séraphine's face.

"Aw," Reid chuckled. "Isn't she precious?"

"Yeah," Élise nodded her head and tapped Séraphine's nose again. "And judging by her little yawn, I'm going to put her down for her nap…"

KNOCK-KNOCK-KNOCK!

"Who would that be?" Reid pondered.

Élise gestured her shoulders up-and-down, "Well, I did order something on Amazon, so maybe…"

They opened the door.

Reid's eyes enlarged, and his mouth cracked open and whispered, "Dad…"

William Reid stood in front of them with a small smile and his bags in his hands.

A still surprised Élise asked him, "What are you doing here, Papa Reid?" She correctly guesses, "Are you here for Father's Day?"

Nervously shaking his head, William stammered, "I…thought it would be a nice gesture. So, may I…?"

"Absolutely." Reid signaled him to come inside the house and took his bags for him. "Come in. I'll put your bags away."

As Reid went to put his bags away, "Oh, it's so good to see you all again," William gave Élise a heartfelt hug before his eyes glazed at Séraphine. "Hi, Séraphine. It's grandpa." He strokes her head, "You do remember me?"

Séraphine yawned again, making William wide smile again.

"She needs to take her nap, so…." Élise said, snuggling her.

William agreed, "I get it. Understandable."

Élise smiled at William and gave him another hug, telling him, "It really is great to see you again, William."

"Same here."

Élise left to take Séraphine down for her second nap just as Reid comes back. "I put your bags away, and just so you know, my boss's son, Jack, is staying here for this weekend. His dad's away in Pakistan for work, and his Aunt's on a business trip for the weekend.

"So, you offered to look after him this weekend," William said. "That's very noble of you."

"Thanks." Reid soon asked his father, "Are you hungry? We're having tacos for lunch."

William rubbed his stomach. "As a matter of fact, I am."

"Can you say, grandpa?" William goofily asked Séraphine. "Can you say grandpa, Séraphine? Grand…pa. Papa. Paw-Paw."

Séraphine babyishly giggled and waves her arms in the air; Élise watches this conversation with Séraphine and William as she was taking some Polaroids. Élise sees Reid and Jack walk into the living room with a Captain America-themed kite, "Hey, you two."

"How is everyone?"

William laughed, "Séraphine's such a little angel. I think she's enjoying my company."

"And by the look on her face, Séraphine loves you." Reid stroked Séraphine's head before noticing her yawn. "And now, she needs her third nap."

Élise agreed, "Definitely." Soothingly taking Séraphine back into her arms and suggesting to them, "Why don't you guys head on down to the park and play? I packed you guys some snacks in the kitchen. You can take Opal with you, and while Fifi's napping, I'll make you guys a Father's Day dinner."

Reid liked the idea, "Okay," Reid calls out for Opal, coolly relaxing in the corner, "Come on, Opal."

"Okay," William said as he kisses Séraphine's head and rose from the couch. Waving her, "Bye."

Reid walked around the couch and kissed Élise's lips and Séraphine's forehead, "Love you as well."

Élise joked, "You kids have fun but don't have too much fun, okay?"

It's been almost an hour, and while Jack spent most of the time flying his new Captain America kite with Reid and his father's help with holding the kite and holding the string, Opal was hanging out with some of the other black Labradors. After eating some of the snacks Élise packed for them, Jack was now playing fetch with Opal; Reid and William watched them having fun.

"Look at them," Reid chuckled. "I swear, Opal can play fetch for hours until she gets tired. And believe me, she can." Reid soon asked his dad, "And speaking of pets, how's your cat?"

William sighed, "Haven passed away."

Reid's mouth opened, "I'm sorry to hear that."

"Thanks, but it's okay." William meekly jerked his shoulders, "She's been sick for a long time. At least I know she's over the rainbow bridge."

"Now you got me worrying about Opal," Reid reminisced when Rossi came by the house nearly two years ago with baby Opal in his hands. "Like kids, pets can grow up so fast."

William shakingly let a tear fall from his eye; Reid noticed this when his father wipes his eye down, prompting Reid to ask him, "Are you okay?"

William rapidly blinked his eyes and reached into his pants pocket, and pulled out his wallet. And reaches for a small photo before giving it to Reid.

It was a picture of his father and Reid as a young boy.

"Wow." Reid breathlessly said. Looking to him, "You kept this after all these years."

William pulled out more small photographs, including one of him and a newborn Reid.

"You being born was the best day of my life. To find out you turned out to be an extraordinary child was a bonus. And becoming a grandfather 29 years after I became a father myself…" William choked up. "It's all so much. I'm sorry I wasn't there for you. And I'm going to keep on apologizing to you until the day I die for abandoning you and your mother. Despite your mother's illness and with what happened with Riley Jenkins…" His sigh trembled. "…It was no excuse for leaving you both. And not contacting either one of you. And not seeing you again until seventeen years later."

Reid wiped a tear away, "Yeah. I love you, dad."

"I love you, too."

They share a heartfelt hug.

"Happy Father's Day!"

Élise presented Reid and William Father's Day dinner: tandoori chicken, pasta primavera, coffee, and chocolate-sprinkles donut ice cream sandwiches.

"It wouldn't be Father's Day without some of your favorites, huh, baby?"

Reid rushed to hug and kiss Élise.

"Oh, thank you for this feast we're about to consume."

"Thank you, hubby-wubby." Élise growled, "And Happy First Father's Day to you."

After checking in on his Séraphine, Jack, and his father, Reid walks into his bedroom. Getting into bed, Reid smiled as he looked through the First Father's Day section of the memory book, including the hug Jack took on the Polaroid when Reid and his father weren't looking. Élise left on the bedside.

"Oh…Spencer…"

When he looked up, Reid's eyes flashed, and his pupils dilated. His dropped-and-couldn't-close jaw slowly turned into a broad and dimpled smile.

Élise in a violet floral embroidered tulle push-up bra and matching hipster briefs.

As she walked towards the bed before crawling and cuddling next to Reid,

"I just wanted to give you one last surprise to really make your first Father's Day completion." Élise reached into her bedside table and pulled out a small box. Reid opens it,

"Oh, look at this."

A gold chain with Dada engraved on the pendant.

Élise licked her teeth and whispers to him, "Happy First Father's Day, papa."

Reid whispered back to her, "And thank you for this unforgettable Father's Day, mama."

They embraced in a passionate kiss before pulling the comforters over them.