One Night Changes Your Life

A/N: This story is a follow-up to my oneshot "One Night", posted in the Advent Calendar-series as Chapter 16. Updates may be slow, at least until after the holidays, and I'm not quite sure how to end this. Please review and let me know what you think!

Disclaimer: CM and its characters don't belong to me.

Chapter 1

"No, this can't be true!" Jennifer Jareau shook her head violently as two pink stripes appeared on the pregnancy test she'd just done. Her knees began to weaken as the realization sank in, and she had to sit down at the edge of her bathtub.

"God, this is so messed up," she thought, on the verge of bursting into tears. "How's that even possible? I'm on the pill!"

A thousand thoughts ran through her mind, but she couldn't seem to get a hold of them, dizziness waving through her body, making her sink onto the floor. How was she going to explain this to him?

It had been one night. Only one night that should make her feel like a desirous woman again. "Henry is only six months old, how am I going to handle two babies?"

Will, Henry's father had left her three months after the boy's birth, going back to New Orleans, where he'd come from. He had said that he missed his hometown, but JJ knew it was because of her, because she hadn't been attractive enough anymore for him. She knew it, because he'd told her on more than one occasion from the moment she and Henry had left the hospital that she should get rid of the baby weight on her hips. God, she'd tried, but it was not like it would secretly disappear after a few weeks. And with a newborn, her priorities were different for the moment. As the weeks had passed he'd pressed her harder, and she also noticed the way he looked at other women. She never knew if he had actually done more than just look at them, she never wanted to know, but after a while it was enough for her to take. Telling him that they both together would never work, he almost seemed relieved, ending things quickly by going back to Louisiana.

All of this wasn't quite conducive to her self-esteem, though, and she felt like she would never be interesting enough anymore for another man until he came along. David Rossi had told her with that deep, seductive tone in his voice that he'd thought Will LaMontagne was a fool for not noticing that she was more attractive, and sexier than ever before. He had invited her over to his cabin to prove his words to her, and she had agreed.

Her mother was watching Henry that night, when JJ followed him home.

She'd had the best sex in her entire life, for one night she had lost herself in the gentle touch and the strong arms of David Rossi. When the next morning came, they'd both agreed to leave it at that one night.

It was especially hard for JJ to pretend like nothing had happened, but she didn't want to destroy their good work-relationship by demanding something from him that he didn't seem to want to give. She realized over the next couple of weeks that David Rossi had managed to capture her heart, mind and soul, and it became harder and harder for her to pretend that this night hadn't meant anything to her. The fact that Rossi seemed to take it a lot easier, almost made her cry every time she saw him, and she had to hold back from smacking him in the face.

And now this. JJ couldn't quite determine how he would react when he heard the news, but she was sure he'd be less then thrilled. Hell, and she had assured him that she was on the pill!

She knew he liked children, he was good with Henry every time she brought him with her; as long as they weren't his own, he was fine, but he had stressed on more than one occasion that, since it didn't happen with three ex-wives, own children obviously weren't meant to be in his life. "And honestly, I never really saw myself as a father," she heard him tell Hotch once.

Two days later, her doctor had officially confirmed JJ that she was indeed pregnant and she had slowly gotten used to the thought of expecting another child so soon after her first.

Now the moment of truth had come. She was standing in front of Rossi's office, nervously debating with herself if this was really the right moment for telling him such big news. The night before, she had briefly thought of not telling him at all, of simply saying that the baby was the product of a one-night stand with a stranger once she started showing, but she knew better than to lie to a profiler. He wasn't stupid, besides, she'd told him at their night that this was the first time she'd had sex since Henry's birth, and she was pretty sure that Dave knew she was usually not the type of person to have a lot of meaningless one-night stands, despite the one with him.

And to her it hadn't been meaningless at all. She'd never felt anything like that before when she'd slept with Rossi. They had made love, she realized, now finally seeing clearly what making love truly meant. When he'd suggested on keeping it a one-time event, she'd agreed, but it had broken her heart. She knew she'd secretly had feelings for Rossi even before Henry was here, despite trying to make a relationship work with Will, but only in the past few weeks had she started to admit it to herself. Rossi had been a great friend after Will had been gone, having been there for her no matter what, but right now, she didn't know what all of this was worth.

Taking one last deep breath, she knocked on his office door, walking in as she heard his voice – this sexy and deep male voice that she loved so much – call her in.

"Jennifer! What brings you in here? What can I do for you?" She shivered at his use of her first name. He was the only one who did it occasionally and it always made her want to jump at him and kiss him senseless. But right now was not the moment to think about that.

"I, uhm, I've gotta talk to you," she said haltingly, trying hard not to lose the courage she'd talked into herself all morning.

"Sure, sit down." David guided her over to his black leather office couch and sat down next to her.

"What is it?"

Closing her eyes for a moment, she tried to find her words.

"I-I'm pregnant," she finally pressed out, not looking into his eyes but on her nervously teetering feet.

"You – what?" His voice sounded surprised – at best. He swallowed hard and then asked again: "Excuse me?" Now, the anger could clearly not be missed.

"I'm pregnant," JJ repeated, her voice steady and determined now, even though she didn't feel that way.

"But you said you were on the pill? How could you be pregnant?" He was shaking his head in disbelief.

"I was! I don't know how it happened! My doctor said it could be because I'd only taken it for one cycle after Henry's birth. No contraception method is 100% safe," she tried to defend herself.

"Ah, come on, JJ. I'm not buying that. Did you forget to take it, or what?"

"I didn't, Dave. I swear!"

He stood up and started pacing the room. "Great, that's just great," he said sarcastically, flashing her angry glances. "And what are you going to do about it?"

Jumping up herself, JJ snapped: " Excuse me? Are you implying that I should get rid of my child? You know what, you selfish son of a bitch? Go to hell, where you belong!" She stormed out of his office, leaving a stunned David Rossi standing helplessly in the middle of the room, knowing that he had just screwed up big.