Disclaimer: I don't own Fraiser
When David was 15 he came home and sat down at the table.
"Mom," he said, "Dad I have an announcement. You know my friend Sabrina?"
"Of course," Niles said, "She's a sweet girl."
"She has liver cancer. I want to give her a nodal of my liver."
Niles and Dahpne exchanged glances. Dahpne's gut reaction was to say absolutely not but she decided instead to let Niles take the lead.
...
Once David left the room Dahpne looked at Niles in disbelief.
"Niles ow could you let David do this," she demanded, "They'd be cutting into 'is body!"
"Darling, this is something David is determined to do," Niles said, "If we forbade him from doing this he would be more argumentative then ever. We both know that David hates the finger prick and that's the kind of blood test they do. When he sees that he'll back out."
Dahpne smiled.
"Niles you're bloody brilliant," she said.
David did not back out of the blood test. He grunted through it. The next day Niles got a call that said they could go ahead with the biopsy. Dahpne was about to freak out. The biopsy was one step closer to surgery. Surgery could kill David.
"I'm sure it's not a match," Niles said, "They are not blood relatives. Once he sees that everything will be fine."
Luck was not on Dahpne and Niles' side however. As it turned out David was in fact a match. They could no longer play games. They had to talk to David and find out why this was so important to him. Maybe they could talk him out of it. Dahpne really hoped they could.
"David," Niles began, "Why do you want to do this anyway?"
David looked at his father.
"Dad," David said, "I love Sabrina. She needs a new liver. If mom needed a new liver and you could donate part of yours and it would get her better or if aunt Roz needed one or if Uncle Frasier needed one wouldn't you do it."
Dahpne sighed but a proud sigh.
"I suppose you have a point sweetheart," she said, "But I'm worried about it."
"So am I," David said, "But I'm more worried about my best friend dying."
The big day came. David got through the surgery just fine. So did Sabrina. In the waiting room Niles and Dahpne spoke of nothing but how proud they were of their son.
"It's so odd," Dahpne said, "All the things we taught him he's now teaching us"