Mary Trump hit her uncle, Donald Trump, with some blunt questions about his relationship with devoted White House aide Natalie Harp in a post on her Substack website Wednesday.

The president’s niece, in a wider essay about what she described as her uncle’s long history of making misogynistic comments and attitudes toward women in America at large, zeroed in on his relationship with Harp, which has drawn increasing scrutiny in recent weeks following Sen. Jon Ossoff’s (D-Ga.) viral “travel with Natalie” speech line.

Mary Trump, a clinical psychologist who has become a fierce critic of her uncle, asked why those on the political right appear unbothered by his closeness with the 35-year-old Harp who, she said, “by all accounts, is with Donald practically 24 hours a day.”

Mary Trump noted how Harp was one of just four people in July to join her uncle in secretly switching off Air Force One amid concerns about a potential attack by Iran.

“What is she doing there? Why is she with him?” she asked. “Why is it that, out of that tiny number of people, he decided that she’s one of four who should not be blown up?”

Mary Trump then challenged her uncle’s defenders over how they could “spin the fact that this decrepit deviant spends practically 24 hours a day with a woman 45 years younger than he is who is not his wife, not his daughter?”