"Mom! Mom! Wake up!"

Erin blinked rapidly, trying to acclimate herself to who was speaking to her. "Chels…?"

"Yes! The doctor just called, and she wants us all to meet her at her office, the test results are back."

Instantly, she sat up in her bed, rubbing her eyes and then gazing at Chelsea. "But it's a Saturday."

Her daughter shrugged as she thrust out a change of clothes. "Doctor Stevens says that she always rushes these tests, and that she wants us to know as soon as possible. I already called Davie-poo, he's on his way over to pick us up, and Dad will meet us at the hospital."

"Wait, does that mean one of us was a match?" Erin felt like she was walking through syrup, unable to catch up to where her daughter was, and she frowned a little as she waited for an answer. "Chelsea? Is Penelope coming, too?"

"Yep. She's the first stop, since her apartment is on the way to our home. Oh, Mama, I feel so energized, so alive!"

Erin smiled to hear the joy in her daughter's voice, and she shooed her child out the door so that she could get dressed. "Give me ten minutes to pull this on, and then we can wait on the porch for David. Okay?"

"All right. I'll even start the coffee for you."

Erin gave Chelsea an indulgent smile, closing the bedroom door on her before letting out the deep breath that she had been holding onto. She seemed keyed up, too full of nervous energy, praying that she would be the one that matched her daughter. She wanted to be able to give her daughter a renewed chance at life. Sighing a little, she shucked off her nightie and threw it into the hamper before slipping on the matching bra and panty set. Even though it was a Saturday, Chelsea had chosen a skirt and blouse for her, as if she knew that that was how David liked to see her.

Smoothing the blouse down against her stomach, she tucked it into the waistband of her skirt before heading over to the vanity and brushing her hair into some semblance of order. Erin decided to forgo makeup, except her usual lipstick, needing to give some color to her lips. Smiling at her reflection, she got up off the bench and stepped into a pair of black flats.

"Finally," Chelsea said as she opened the bedroom door, thrusting a steaming mug into her hands. "I already put the cream and sugar in, just as you like it."

"Thank you," Erin replied, holding out her elbow. Chelsea took the hint and threaded her arm through hers as they walked down the stairs together. It was nice to have this communion with her daughter, though she hated that it had to be something like this that brought them close together. "Chels, when this is all over, and you're well, I want you to live with me."

Chelsea tightened her grip on Erin's arm as she nodded. "I would really love that, Mom." They stopped at the foot of the stairs, and Erin turned to Chelsea, kissing her cheek softly before resting her forehead against her daughter's. "But what if Davie-poo asks you to move in with him? Will I still be welcome?"

"Of course, and if he doesn't want you, then he's lost me, too."

"Heaven forbid that ever happens, cara." She looked up to see David standing there, a soft smile on his face. "And for what it's worth, Chelsea, you two are a package deal. When I ask her to move in, you are more than welcome to come along."

Erin sighed a little and stepped away from Chelsea, blinking back the tears that suddenly threatened to fall. "David, when did you get a key?"

"Oh, I had Kitten make me a copy of hers, I always figured that I would need it someday." He stepped closer to her, and she welcomed the embrace that he gave her, nuzzling her cheek against his suit coat. "Now, she is waiting for us in the car. And I do so hate to keep a woman waiting."

"You're learning, David," she murmured before taking a long sip of her coffee. "But I think that she can wait for the space of a kiss."

"I think so, too." Leaning in, he kissed her softly, tucking a piece of hair behind her ear before taking hold of her hand and leading her over to the door. "Come along, Chels."

"Yes, Papa Dave," she said, grinning at them. The joy in her eyes was infectious, and Erin found her smile growing as they stepped outside and she waved to Penelope waiting in the car. "I'm calling shotgun!"

"Yes, darling," she said as she locked the door. Erin found herself hanging back, watching the way that Chelsea and David fell into step as they walked. There was something so similar about their gaits, that she wished Chelsea was his daughter. Sighing, she slipped into the back seat of the vehicle, smiling at Penelope. "Good morning, Penny."

"Erin! Oh, this is so exciting! I mean, Chelsea did tell you, right?"

There was something more to her words, and Erin found herself shaking her head a little. "No, all I know is that the results are back. I'm assuming that we'll find out more when we get to the hospital."

"Well, let me fill you in just a little. Your daughter left out the amazing fact that one of us is a perfect match for her. I mean, not just close, but one hundred percent perfect. The odds of that are astronomical, which makes my heart so happy. We are going to make your daughter well!"

Erin felt overwhelmed as she tried to let the words 'perfect match' sink into her mind. She had hoped for something close enough to make Chelsea well, and here, God was answering her prayers in a might way. Though she had cried so much in the last few days, she found that she still had tears to shed, and she let them roll down her cheeks as she blindly reached out for the younger woman's hand. Penelope threaded their fingers together, holding on to her tightly as David drove them to the hospital.

It took a while, but Erin was soon able to focus in on the conversation that Chelsea and David were having, and she smiled to hear them talking about what it was like to work in the BAU. She hadn't known that her daughter held an interest in her work, so that was quite the eye opener for her, and she smiled as the listened to them converse.

Somehow, they managed to get a spot right next to Alan, and she stiffened a little to see the horrid look he have their car as he noticed who was in there with her and Chelsea. Shaking his head, he stormed off, and Erin shuddered a little as she got out of the car. David noticed her emotional state, and came right over to her side, wrapping his arm around her waist and guiding her into the building.

For all Alan's hurrying, they still ended up on the same elevator, Nick and Amelia catching up to them. Erin was so grateful to see her children gather around each other, talking lowly as they waited for a car. On the way up to Doctor Stevens' office, Erin found herself tapping her foot anxiously, needing to know the results.

It was Penelope who took her hand as they went down the hall, Chelsea taking her other one, ignoring her father. The door to the office was open, and they all filed in, Chelsea and Erin taking the seats in front of the desk.

"Oh, good, you got here right away. I have wonderful news to give to you all. And David, you're here as well. Perfect. We'll need to start discussing when would be the best time to harvest your bone marrow."

Erin's brow furrowed a little as she tried to parse the doctor's words. "I'm sorry, what?" she finally asked, grabbing hold of Chelsea's hand as a heavy coldness began to fill her body.

"We'll need to start the process as soon as possible. David Rossi is a perfect match for your daughter."