"I'm fiercely protective of them, obviously," she told host Andy Cohen. "I don't think it's easy. It's not a job that they wanted, and so it's hard. Obviously I had a hard time."
Then a viewer asked the former first daughter if she ever "fooled around" in the White House. She was 19 when George W. Bush assumed the presidency.
"A lady never talks," she responded, adding that her husband was on set.
"Maybe there was a little hanky-panky, maybe there was a kiss on the roof," she admitted.
Watch below in two clips: