The presenter, 38, and her co-star Phillip Schofield, 57, were taking part in a debate about a study that found one-third of women aren't interested in sex.
Real Housewives of Cheshire star Dawn Ward, who was a guest on today's (09.01.20) episode, revealed she has sex with her husband of 25 years, Ashley, about three times a week.
Holly wasn't willing to be that candid though, because the same question was put to her and she shut it down immediately.
This is not something anyone needs to know.
She stammered, shaking her head: "I am... not part of this. This is not something anyone needs to know."
Holly then elaborated: "I can talk about this with my friends, but I'm not going to talk about it here."
Elsewhere on today's This Morning, actress Miriam Margoyles caused a stir when she dropped a four-letter expletive live on air.
Touching upon the huge royal news today that Prince Harry and his wife Meghan Markle are stepping down as 'senior' members of the Royal Family, hosts Phil and Holly asked Miriam to describe the moment she met the Queen.
Miriam explained: "Well, I have talked about this before on television, and I feel sort of awkward saying it again. But I was invited to the Palace as part of British Book Week.
"And when the Queen came over to me, and she asked me what I did in a very nice way, I said like a [bleep], 'I'm the best reader of stories in the whole world'."
The 34-year-old Irish presenter, brought in to replace Caroline Flack in the wake of her recent assault charge, said on the programme: "This is the first time I've been to a Love Island villa so I've got nothing to compare it to, but I've been told it's a lot bigger than the one in Majorca."
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