What would have happened
Disclaimer: Do I have to write it, you know what it's going to say:
"I don't own Charmed in any way whatsoever"
The day Chris was born Leo wouldn't hold him. He would hold his wife. Telling her, that Wyatt had disappeared. Someone had kidnapped him. And neither him, nor her sister knew who. Piper would cry into his shoulder while holding Chris. When Piper had finally fallen asleep Leo would return to the attic and search for Wyatt. He would search for Wyatt day and night. He would search until he passed out at the couch or chair or wherever he was sitting. One time he would pass out standing. Just fall to the floor. After a couple of hours sleep he would wake and then he would continue searching until he passed out again. Paige and Phoebe did almost the same. Paige tried to keep the club running too; they had to live of something after all. Phoebe couldn't concentrate enough to work. She had taken time off, and searched just as frantically at him. Piper would try to keep it together. She would take care of Chris, and whenever Chris didn't need her she would join the search.
They would go to the darkest places in the world, they would go to the most secretive places they knew, and even places they didn't. They would search this world and the next and the world in between, but they didn't find him. They would ask anyone for help. They would ask Darryl and the police, they would ask the elders, they would ask witches and whitelighters, they would ask demons and darklighters, they would ask the cleaners and every seer they knew. But no one could answer them.
They searched for exactly two months, one week, two days and four hours. And then suddenly Wyatt would appear out of nowhere. Suddenly he was just standing in the attic in front of Piper and Phoebe. They would call for Leo and Paige and they would all feel relive. Leo would pick up Wyatt and hug him. Piper would cry. Phoebe would introduce Wyatt to his new little brother and Paige would sit down on the couch and just stare.
They would celebrate. They would go back to being a family. They would still search for whoever it was that had taken him. But they wouldn't do it like they had for the past two months. Wyatt was back now. They could relax and Leo would promise himself that he would never let anything bad happen to either of his sons again.
TBC