I do not own Criminal minds CBS do, I do own Sam.

This is number three in my fanfic series about Spencer and Sam.

A mystery

Spencer Reid dumped down beside his girlfriend Sam in the sofa to watch some movies as it was their movie night, but his thoughts was on something else, and it took Sam a few tries before she could get any contact with him.

"Hey Spence, what's the matter?" She asked "Has something happened at work?"

"Nothing happened not really it is just Hotch has been acting weird this last few days," Spencer said and held up a movie a British comedy and Sam nodded.

"Weird how?" She then asked and popped the DVD in the player and sat down beside Spencer again.

The movie started and Spencer forgot momentarily about his weird acting boss and just enjoyed spending time with his girlfriend.

It was first when they were in bed for the night that Hotch weird behaviour return to Sam's mind.

"Spencer," she said and turn to him in the bed "Remember that you told me that Hotch had been acting weird this few days?"

Spencer nodded.

"Yeah he disappear of somewhere," He said "and he have started to text someone every hour or so. It's weird."

Sam giggled little and then she kissed Spencer.

"I think I know," she said teasingly and kissed him again "But you are the profiler, so am not telling, Spence treat it as a case and profile Hotch and see what you find."

Spencer smiled and wrapped his arms around Sam and both soon fell asleep.

The next day Spencer watch Hotch more closely and tried to profile him.

"Hmm he text someone but who? Not that is not the right question," he mumble to himself while he was working on the growing load of paper work. "He smiles a lot more this last few days, so whoever he is texting it makes him happy, could it be Jack no the smile is not a parent's smile it is more in-love like smile."

"Hey Pretty boy what are you mumbling about?" Morgan asked and gave the young genius a mug with coffee "Just the way you like it more sugar than coffee."

Spencer smiled and thanked Morgan.

"Hey Morgan have you also notice that Hotch have been acting strange this past few days?" He then asked

Morgan stopped and thought for a minutes and then he nodded, yes he had also notice that.

"Yeah why do you think that is?" He asked Spencer.

"You boys are so slow," come a teasing voice from behind them when they turn around stood JJ there smiling a smile that showed that she know something that they didn't.

"Okay so you know why Hotch act like that?" Morgan asked

JJ nodded.

"He act like a lovesick puppy," said a deep voice behind them and there stood Rossi smiling "But who can the target be?"

They soon started to discuss who Hotch was texting, Morgan even ask Garcia to see but she said that she couldn't because she didn't want Hotch to be mad at her.

"I think I have figure it out," Spencer said when he got home that day,

"Oh really figured what out?" Sam said from her place at the table reading though essays and muttered about idiot and idiot brats with rich stupid parents.

Spencer laughed Sam always got irritated by her students when they didn't write good essays, he walked over to her and kiss her on the head.

"I will make the dinner today," he said "And I figured it out Hotch has a new love interest, but who could it be?"

Sam looked up and smiled.

"Well that love is something even I don't know," she said "Thanks, I have too many of this to read I am sorry."

It was first a week later that Hotch gave the rest of the team what they thought was a clue to who he was texting.

"Okay I have an appointment in two hours," He said and blush slightly

As soon as he had left the room the guesses started to go around.

"What if Betty is back?" said JJ "or maybe it is Jessica I mean he is there often with Jack."

"No maybe it is a married woman," Rossi said and wiggled his eyebrows.

The only ones that didn't guess was Tara and Garcia, Tara because she had not yet felt she know Aaron Hotchner enough to guess and Garcia had a smile on her face a secret smile.

Spencer and Sam talk about Hotch's appointment that evening.

"Rossi can be right maybe it is a married woman," Sam said and snuggle up against Spencer.

Spencer laughed.

"Hotch with a married woman?" he said but then he thought about it "You may be right, I mean I have nearly never seen Aaron Hotchner blush like that."

At Hotch's apartment.

"Boys dinner is served," a woman called out "That means you to Aaron."

Hotch and his son Jack come running.

"Thanks love," Hotch said and kissed the woman while Jack acted like he was being sick over the lovey dovey his dad and dad's new girlfriend was doing.

Soon sat all three of them down at the table eating the pasta bake that the woman had made and making small talk.

"So Jack how was school?" the woman asked and put some steamed green beans on her plate.

"Okay, we had a test about history and next week we are having some history professor as a class guest," Jack said and took a big bite of the food on his plate.

"Do you remember the name of the professor?" Hotch asked and took a bite of his food.

"Samantha Winchester I think," Said Jack

"That is Uncle Spencer's girlfriend," Hotch told his son "Jack tell her hi from us when you meet her."

Jack nodded he thought it was cool that Uncle Spencer's girlfriend was a history professor.

The rest of the dinner was eaten in silence.

"What are for dessert?" Jack asked looking at the woman.

"I have spoiled you two," she said laughing and went to fetch the chocolate pudding she had made earlier that day. "But Aaron is it really okay for you to eat this with your tooth?"

"Yes I ask the dentist and she said that it was okay," Hotch told her smiling.

Later when Hotch and the woman was lying in bed ready to fall asleep.

"Sweetie you do know that the team is on to us," she said and cuddle closer to Hotch's chest.

"It that so?" He said smiling "So should we put them out of their misery or keep this a secret?"

The Woman looked up at him.

"What do you want?" she asked thinking that he wanted to keep it quiet and that he was embarrassed about her for some reason.

Hotch saw the fear and insecurity in his girlfriend's eyes.

"I don't care who know about us," he said and kissed her it was a kiss filled with love. "I just thought it would be fun to see if they could figure it out."

The woman smiled.

"We let them have one more week," she giggled.

The End of first part.

So who could Hotch new love be?

Any guesses?