David Jouvenat’s 49-year-old wife, Mildred, was killed Sunday when a suspected drunk driver of a Ford F-150 pickup truck crossed the centerline on Piilani Highway in Kihei and crushed her car.

On Monday, his 14-year-old son, Jacob, who was a passenger in the small Nissan Versa his wife was driving, was pronounced dead.

At 2:20 p.m. Wednesday, his son’s organs were harvested and will save three lives, but Jouvenat wants to help save many more.

“I want preventable accidents to be prevented,” said the 62-year-old Kihei man, his voice breaking with emotion, adding, “I’m welled up now with tears in my eyes.”

“I’ve stopped friends from driving,” he said. “ When you see someone drinking excessively, because they’re not thinking appropriately and logically when they’re drunk, don’t let them drive. … If you have to, tackle them and take their keys.”

At 7:24 p.m. Sunday, Mildred Jouvenat was on her way to pick up their 11-year-old son Jeremiah, who had been visiting a friend in Maui Meadows. Jacob was seated in the front passenger seat when the F-150 barreled into the small car.

Jouvenat, an early riser for work, was already asleep when a policeman knocked at their door with the message: “Your wife is dead. She was in a car accident and was killed instantly. Your son is in the hospital with life-threatening injuries.”

Meanwhile, Jeremiah was dropped off at home by his friend’s father.

“He’s in shock, he’s crying, ‘My mother’s dead and my brother is in the hospital,’” Jouvenat said.

He, Jeremiah and his mother-in-law, who lives with them, and their landlord and his family rushed to the Maui Memorial Hospital and were told Jacob was brain dead.

“Jacob was looking toward a very bright future — college,” David Jouvenat said, adding he would have likely earned a scholarship.

David Jouvenat said Jacob was a good student with lots of friends, had just completed Lokelani Intermediate School and was headed for Maui High School. “He was very outgoing with his friends, but a little introverted with people he doesn’t know.”

“He was a great kid, never been in any trouble, had an excellent group of friends,” he said. “He’s very good-hearted, good-natured kid.”

“My wife and I don’t go to bars or nightclubs,” he said. “We spend a lot of time with our kids, and it shows in how well-mannered they are. …They’re not starved for attention. We love them dearly.”

Mildred Jouvenat, who worked as a housekeeper at the Grand Wailea for the last 10 years, was originally from a fishing village near San Esteban in Ilocos Sur in the Philippines.

Jouvenat has had to console his surviving 11-year-old son “who cries himself to sleep because he misses his mom and brother.”

“I’m still emotionally distraught,” he said. He said he is grateful for support from his wife’s many relatives and consults them for everything.

He praised the entire hospital staff, saying there are “no slackers among them and are all caring, loving people.”