Disclaimer:Being a dad means giving up motorcycling and parachuting. You now have responsibilities.
Sasuke knew that if Itachi hadn't died before Sasuke had kids, Sasuke would have stopped chasing after him. As much as it would have pained him, Sasuke didn't want to put his kids at risks because while he was gone trying to track down Itachi, Itachi had been hiding around the village waiting for the moment Sasuke left.
Being a ninja was dangerous enough but add in extra dangerous activities and hobbies and you the chances of you living to see your kids be born were non-existent.
Thankfully, aside from planning to kill Itachi, Sasuke didn't have too many dangerous hobbies. He did like to do some hardcore training in the Valley of the End. It brought back the painful memories of when he first left Naruto and how much of an idiot he was which encouraged him to train even harder.
Naruto looked at the clock. It was Sasuke's usual training hour and Sasuke was still at home. "Sasuke, shouldn't you be at the Valley by now?" Naruto asked. They were in Naruto's office. Naruto was doing some brought home paperwork and Sasuke was reading a novel/supervising Naruto.
"I'm quitting training at the Valley for awhile." Sasuke said turning a page.
"Why?"
"Because you and the baby are a thousand times more important."
"So you wanna give me a foot massage now?" Naruto asked putting his foot on the recently polished, clean desk.
"No! And put your foot down. Its rude."