The Talk co-host Sharon Osbourne had an interesting way of asking Melissa Gilbert how she learned that her sister Sara Gilbert is gay.

Melissa Gilbert, who is best known for playing Laura Ingalls Wilder on the long-running NBC drama Little House on the Prairie, appeared on the show's Tuesday episode.

“On the subject of love and relationships. When did you first realize that your beautiful sister loved vajayjay?” Osbourne asked as the co-hosts gathered around the show's kitchen table.

The question drew applause from the audience and laughter from the co-hosts, especially Sara Gilbert who appeared a bit embarrassed.

“You know what, I'll put it to you this way. … I took her to dinner when she was in her teens and I sat her down and I gave her this long speech about how much I love you and it doesn't matter and you're my darling and blah, blah, blah and you can tell me anything. And she looked and me and she said, 'I'm not gay.' And I was like, 'OK, whatever.'”

Melissa Gilbert added that she always kind of knew. (The video is embedded in the right panel of this page. Visit our video library for more videos.)

(Related: Sara Gilbert discusses new girlfriend Linda Perry.)