Disclaimer: I don´t own CSI or any of it´s characters, they belong to CBS or Anthony Zuicker or whoever and I don´t own "the parent trap" either I just borrowed the idea of the plot for this, but it originally belongs to Erich Kästner. And last but not least,I don´t own the song Rain or Shine, that one belongs to Vonda Shepard.

A/N: While I was watching "the parent trap" a few days ago this idea popped into my head and this is what came out of it. This is going to be a GS-story as I´m a total GS shipper.

I took the name Hailey for on of the children not because something similar is used in the Disney Movie with Lindsay Lohan but because I just love the name.

Thank a lot to vikki138 who beta-d this for me. All mistakes are mine! And thanks for reading and (hopefully) reviewing!

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Rain or Shine

There is a reason, we came together Rain or Shine I´ll love you all my life – Vonda Shepard Rain or Shine

Prologue

„Gil, we can´t keep doing this."

"I know." He slumped into an armchair defeated. They´d done it again. And the only reason they´d stopped was because the twins had woken up. Their screams had muffled their own, leaving them shocked at their capacity for so much anger. They had forgotten about their sleeping children.

Now Grissom sat, Hailey in his arms while Sara tried to calm down Katie by walking through the living room.

"I don´t want them to grow up like this," she whispered when both their daughters had calmed down enough for him to hear her.

"Neither do I." He admitted, sighing deeply.

They hadn´t intended for her to get pregnant so early in their relationship. To be honest, Grissom had never really intended to have children at all and neither did Sara. It didn´t mean they didn´t love the twins with all their heart, but the pregnancy and the birth of them had destroyed all their plans. And their fairly new relationship suffered because of it.

Sara didn´t know how to deal with all of this: her mood swings, the pregnancy itself...she had changed a lot and Grissom didn´t seem to be able to catch up with her. He himself had changed, but not the way she´d hoped he would. He excluded her again, leaving her feeling alone with all of the changes and the fighting had begun almost immediately after they´d found they would have not one baby but two.

Sara sat down on the couch, careful not to wake the now sleeping Katie. Tears began to gather in her eyes. The sadness always set in after the anger, but she realised it all had to stop now. She didn´t want her children to grow up like she did, with parents fighting all the time and them feeling like they were the cause of it.

"I am going to leave." Her voice was still quiet but loud enough for Gil to hear her and lift his head in surprise.

"Sara we can..."

"Work this out? No Gil, we can´t. You know that as much as I do. We have tried, it doesn´t work. I don´t want them to have to suffer because of us. I need to leave." Another tear slipped out of her eye, but she didn´t bother to wipe it away.

"Where´ll you go?"

"I don´t know, away from you, that´s for sure."

"And the kids..."

"I don´t know, we need to find a solution."

She´d already thought about this, but didn´t want to tell him yet, afraid of his reaction to her plans. She needed to get away from Grissom, not only temporarily but permanently. She couldn´t keep being hurt like this. She knew if she stayed she would be destroyed by it, by him, and she didn´t see herself raising her children as a broken woman.

"I don´t want to be away from them." Grissom had given this some thought as well and he was determined that he wouldn´t become one of those weekend-dads. He loved his children and he needed them. She couldn´t just take them away.

"I didn´t say I´d take them both with me." Sara lifted her head to look at him. "Grissom I need to get away from you, you know that and I know that. And I mean not just move into another apartment or house here in Vegas. I need to move far away from you, like...far away."

"What are you saying? That you want to move to another city?"

"Yes."

"What about the twins?"

"Well...I thought about...both of us taking one." Sara admitted, looking onto the floor. She felt ashamed to want to leave one of her daughters, but it was the only way they could handle this fairly.

"You mean I take one, you take the other with you and they come to visit one of us alternately?" Grissom asked incrediously.

"No, I mean, you take Hailey, I take Katie and...that´s it. No visits, no phonecalls or letters. One of them has you, the other has me."

"But...why...I mean how do you think that will work? Why should we do that?" Grissom was totally confused. How could she even suggest to leave one of her daughters and expect him to just do the same.

"I don´t want them to grow up in such a disfunctional environment. I don´t want them to always miss you or me when we´re seperated. And I don´t want them to have to choose where to live later."

"But..."

"No Gil, think about it: It´s the best solution. They are still so young now. They wouldn´t remember. Both would be able to grow up happily. I know you´d take good care of Hal and you´ll love her so much she won´t even have to miss me. And I am going to make Katie just as happy or at least I´ll try my best to do so."
It had been hard to choose which of her children to take with her when she´d contemplated this option, but Hailey had been daddy´s girl from the beginning on, always falling asleep peacefully as soon as Grissom held her. Even at three month now Grissom was her favourite. Not that she did not like to cuddle with Sara, well she had to while Grissom was at work, but when she heard her father´s voice she always seemed to be much calmer while Katie was more Sara-fixated.

"Please Sara let us try to work this out...I´ll really try..."

"You say that since the fighting first began, but nothing´s changed. Please Gil, let us go. It´s for the best."

She could see he was contemplating her idea, but he already knew he didn´t have much of a choice. Sara was right, it was probably for the best. But how could he leave Katie and Sara, two people he loved more than his own life. They were his life, they were his everything.

But as he looked down at Hailey´s sleeping form in his arm, seeing the wet marks, the tears had left on her cheeks earlier he realised he couldn´t let his daughter grow up in a broken family as well.

"Okay." He finally whispered, his voice broken.

"Good." Sara stood up to lay Katie back down in the nursery. "I´m going to pack." While they´d talked she´d decided it would be best if she left immediately. She already knew a place where she could stay, but she wouldn´t tell Grissom.

While she packed, he went to the nursery himself to lay Hailey down and take one last picture of his daughters together and one of Katie alone. His heart ached already. How should he go on without them?

As the sun began to rise Sara was ready, having packed everything that seemed important to her and all the things Katie would need. Her carrier was already standing next to the door as Grissom lifted her out of her crib for the last time to say goodbye.

He walked to the door while Sara brought her baggage to her car and afterwards took Hailey into her arms.

Her heart broke as she had to let her daughter go, knowing she would have to grow up wihout her. It´s the right thing to do Sara. She told herself over and over as she put Hailey down onto her play blanket on the living room floor.

"I love you baby, you need to know that. I´m doing this for you." As if Hailey sensed what was going on she began to cry, a heartwrenching sound that made Sara´s own tears fall even harder. "Goodbye babe." Sara whispered as she stood up. She needed to leave now or she would stay forever. Grissom would comfort her, she was sure of it and he´d raise her well. She´d be the loveliest little girl Vegas had ever seen.

As she reached the front door Grissom was just placing Katie in her carrier, tears streaming down his face. It was the first time she´d seen him crying except for the moment their children had been born. But this time he cried out of agony not of happiness and seeing him like this made her heart shatter into pieces once again.

"Sara please..." He reached out for her as she lifted the carrier up.

"Go, take care of Hailey." She turned away, not wanting to see the pain in his eyes.

"You know I really loved you." She still did, but it wasn´t the time to tell him so.

"Me too." He whispered just before she opened the door and walked straight to her car, not looking back, never looking back.

Soon he heard the engine start and she was gone. Forever.

Only the sound of Hailey´s crying broke him out of his trance and he finally closed the door after Sara´s car had been out of view for some time already. He needed to be there for his daughter now. Nothing else mattered.