Disclaimer: I don't own Frasier. This is an AU story and it takes place after Daphne confesses to meeting Niles' patient. Niles has never been married before and has only dated Marris and Mel.
"Come on in son," Martin said.
"Thanks dad," Niles said with a sigh, "Can we talk?"
"Sure," Martin said, "Sit down."
Niles sat down.
"So what's going on," Martin asked handing him a beer.
"What's this," Niles asked.
"It's called a beer," Martin said, "Surely you've heard of it."
"I know what a beer is dad but I don't drink those things. Anyway I'm having a problem. I don't know how to deal with Daphne with what she did. I know I have to get mad and-"
"Niles," Martin said, "Can I say two things?"
"Sure," Niles said.
"One, you don't know what you're missing with not drink beer?"
"Yes I do dad. Extra calories and a drink that tastes like warm spit," Niles said, "and second?"
"Son, Daphne didn't do anything wrong. I love you so I have to be honest with you. You were in the wrong here."
"Dad she invaded my privacy. If this gets out I could be in trouble if I don't correct it."
"You had no place bringing your files home," Martin said.
Niles paused. His father was right on that account.
"And you know," Martin added, "How would you feel if the shoe was on the other foot. Suppose that one of Daphne's PT patients fell in love with her? Wouldn't you be insecure?"
"I would," Niles said, "I suppose I can't argue with you there."
Martin patted Niles on the shoulder.
"You'll get used to it son," he said, "Marriage is complicated but you'll get used to it soon"
Niles knew marriage was complicated but he never wanted to get used to it. Life with Daphne was wonderful and exciting in it's own right.