In her new book out Tuesday, Ivanka Trump thanks first lady Melania Trump for her "support and friendship."

"Melania, you are an unbelievable mother with a heart of gold. You give generously of your time and attention and I appreciate your support and friendship," the first daughter writes in Women Who Work.



Ivanka also gushed over Melania in a tweet on the first lady's birthday last week.

"Happy birthday to our First Lady (and my incredible step-mom!) Melania Trump," she wrote. "A wonderful example of kindness and grace for us all!"

Happy Birthday to our First Lady (and my incredible step-mom!) Melania Trump 🎉 A wonderful example of kindness and grace for us all! @FLOTUS pic.twitter.com/k8BpS5cqma — Ivanka Trump (@IvankaTrump) April 27, 2017



Ivanka's adoration of her father's third wife comes after Vanity Fair last week reported that sources have "observed a frostiness between the two."

A source close to Ivanka described the relationship as "fine." A spokeswoman for Melania said "Ivanka and Mrs. Trump have always shared a close relationship, and that continues today."