Twelve weeks after Min Woo Lee captured his first PGA Tour title in Houston, his sister Minjee Lee delivered a major moment of her own.On Sunday, the 29-year-old Australian clinched her third career major by winning the 2025 KPMG Women's PGA Championship at Fields Ranch East in Frisco, Texas.Lee closed with a gritty 2-over 74 in swirling winds and firm conditions, holding off late charges from Auston Kim and Chanettee Wannasaen to finish at 4-under for the week.Her final round was not flawless. She had five bogeys and just three birdies, but it was enough to make her the first Australian to win this major since Hannah Green in 2019.The winning moment came with a steady par on the 18th, followed by a quiet fist pump and a champagne shower from fellow Aussies on the green.While Minjee was making history, her younger brother Min Woo Lee was grinding through a tough week of his own.The 27-year-old finished T63 at the Travelers Championship after carding a final score of +5.But that didn't stop him from cheering her on. "Let her cook, come on sis," he posted on Instagram. Following that was her winning post with 4-word message, "3 time Major Champ," reflecting how proud he was.After her win, he added, "It's nice to be at a major and her game is built for the majors. She's very solid and her mental side is one of the best I've ever seen.""So mix that in with some good putting and good short game and, yeah, she's going to win. I'm very proud of her".The Lee siblings are rewriting golf history together. They're only the third brother-sister duo to win professional golf events, joining Cathy and Billy Kratzert and Jackie and Jim Gallagher Jr.They were already the first to win the same USGA event, Minjee won the U.S. Girls' Junior in 2012, Min Woo the U.S. Boys' Junior in 2016, and the first to represent Australia in Olympic golf.Now, they're the first to win Tour events in the same six-month span.A look back at Minjee Lee's winning momentMinjee's final round was a test of patience and poise. She bogeyed three of her first six holes, but steadied herself with a birdie at the ninth.A clutch par save at 13 kept her lead intact, and back-to-back birdies on 14 and 15 gave her breathing room."I'm mentally fried," she said afterward. "I felt like every day was a grind and I really had to dig deep to do it, but it feels pretty awesome".With this win, Lee not only pocketed $1.8 million from the record $12 million purse, but also moved one step closer to a career grand slam.She now owns major titles at the Evian (2021), U.S. Women's Open (2022), and PGA Championship (2025). Only the Chevron and AIG Women's Open remain.More Golf: How Lydia Ko's Husband Helped Save LPGA Legend's Hall of Fame Career