AN: Wow... it's been a long time! This is the final chapter. I'm kind of sad. This was my first multi-chapter fic on this site, and I can't believe I'm changing it from 'In Progress' to 'Complete'... Thank you so much to anybody who is still reading, and thank you to those who reviewed, favorited, and followed. It makes writing fanfiction worth it! :)

4 YEARS LATER

JJ walked into the BAU bullpen after finishing her last case files of the day. After her kidney transplant, it had taken JJ months to get back on her feet. Throughout it all, Spencer had been by her side, supporting her through physical therapy and just being her rock.

As JJ walked farther into the bullpen, a lovely sight greeted her eyes. Spencer and their son, Lucas, were performing magic tricks for Emily and Derek. JJ smiled as she remembered the day that she found out she was pregnant.

FLASHBACK

JJ was making sandwiches for lunch when the phone rang.

"Hello?"

"Is this Jennifer Jareau?"

"Yes, it is. May I ask who is calling?"

"This is Nurse Delano from Dr. Kingston's office. We need you to come in as soon as possible to discuss the results of your latest bloodwork."

JJ's heart sank. Every six months, blood was taken to ensure that her kidneys were still functioning properly. If they weren't, she would most likely go on dialysis and be placed on the transplant list once again. However, if her kidneys failed again, she would most likely die before finding a donor match.

"I can come in tomorrow morning."

"That's will be good. Dr. Kingston will meet with you then."

"Thank you, goodbye."

JJ hung up the phone, sank to her knees, and began to sob.

Spencer walked into JJ's apartment, and was instantly alarmed when he heard her crying. He walked into the hallway, and saw her on her knees by the phone, crying.

"JJ!" he gasped, running over to her "What's wrong?"

"Spence." JJ chocked, still sobbing.

"Jayje, just tell me. It's going to be okay."

JJ took several deep breaths.

"Spence, the doctor called. There's something wrong with my bloodwork."

Spencer's heart stopped.

"Jay...' he trailed off.

"I'm so scared Spence." her voice cracked, and broke Spencer's heart even more.

"I'm scared too." Spencer said as they sat on the floor, clinging to each other.

The next morning came much too quickly for the couple. As they sat in the waiting room, JJ held Spencer's hand tightly in her own.

"Jennifer Jareau?" a nurse finally brought JJ and Reid back to an exam room.

A few minutes later, Dr. Kingston came in.

"Hello, JJ. Spencer." the woman greeted.

"The nurse who called said you wanted to discuss my bloodwork results?" JJ asked nervously.

"Yes, well, we ran a routine blood panel and we found increased levels of estrogen"

"What does that mean?" JJ asked.

"Well, we want to do an ultrasound to be sure, but we think you may be pregnant." Dr. Kingston gave a small smile.

"Pregnant?" JJ gasped. Reid was just as stunned.

A nurse came in with an ultrasound machine.

"JJ, I need you to lie back on the table and lift your shirt for me." the doctor asked kindly

JJ numbly did so. She couldn't believe she was possibly pregnant!

The doctor spread gel on the ultrasound wand, and placed it on JJ's stomach. JJ and Reid both stared, transfixed, as a tiny blip showed up on the screen,

"Is that?" Reid asked, stunned.

"That is your baby. And..." the doctor pressed a button, and a fast-paced thumping filled the room.

"Oh, my god. That's a heartbeat!" JJ finally spoke, tears running down her face.

"Yes, it is. Congratulations, you two. From my estimates, you are due in around 27 weeks."

"Oh, my gosh," Reid said

JJ looked at him.

"We're going to be parents, Spence! You're going to be a daddy!"

Now, Lucas Jareau-Reid was a bubbly 18 month old, who had already shown signs of inheriting his father's high IQ.

"Mama!" he screeched, as he saw JJ watching him.

"Hey, buddy. Did you have fun with Daddy?"

"Magic twicks!"

"I see that. Are you ready to go? Daddy's got a meeting."

The little boy jumped into his mother's arms. "Bye bye, Dada!"

"Bye, bud. I'll see you later." Reid said as he kissed JJ and his son goodbye.

JJ took Lucas out of his seat and carried him into a local cemetery. As JJ found the gravestone she was looking for, she sat on the ground with Lucas in her arms.

"Hey, Lewis," JJ started "There's someone I want you to meet., This is Lucas, my son. He is 18 months old now. I guess I came to tell you this because if it wasn't for you, Lucas wouldn't be here. Heck, I wouldn't be here. Your kidneys saved my life. You gave me a second chance, a chance to bring a child into the world. You gave me the chance to be with the love of my life. You gave me the chance to live again. So I wanted to say thank you. Thank you for saving me, and thank you for giving me a happy ending."

THE END

AN: *cries* I can't believe it's over! Can you guys please review? Pretty please?