"I'm all done! Feels like I've done 10 million sit ups but I'm ok!" she tweeted after the operation, linking to a photo of herself looking tired but happy in her San Diego hospital bed.
Dan, who runs a 3-par golf course, is probably happy too, looking forward to a healthier, freer life. He was diagnosed with kidney defects 12 years ago and underwent his first transplant in 1999.
A transplanted kidney typically bestows 11 to 13 years of life on its recipient. For the past five years, Dan has spent 10 hours a day hooked up to a dialysis machine. For the past 13 months, he's been back on the transplant list.
"He's been sick my entire adult life," Beth Allen told Golfweek.
While doctors have not yet offering a long-term prognosis for Dan, Beth e-mailed Golfweek soon after the transplant and triumphed, "My kidney worked for my brother right away! I haven't seen him yet but my mom said that he looks better than he has in years."
Part of Beth now rests in Dan, alongside the golfing gene the siblings inherited from their father. Jim Allen was a PGA pro and golf manager for the city of San Diego.
Beth hopes to return to the links in May.
March is National Kidney Month. Approximately 78,000 people are waiting for a kidney. To learn more, visit the National Kidney Foundation.