The presenter was chatting to former Geordie Shore star Vicky Pattison about her series of books when he revealed he couldn’t stop thinking about her in her underwear.
The TV personality explained that she hoped her writing would have “some longevity” and people would always want to read the novels she had penned.
“People are always going to want to read my writing surely,” the 29-year-old noted. “People aren’t always going to want to see me in my bra and knickers.”
Tim then quickly ended the interview as he told viewers watching the Channel 4 show at home: “And on that note, your book, My Sister’s Wedding, is out now…”
He hesitated before adding: “I can’t get that thought out of my mind now. It’s in there.”
As his co-host Simon Rimmer looked off screen, Vicky could be seen giggling at Tim’s sexy confession as he began to blush.
“It’s in there and she’s sitting just there,” he sighed, before begging Simon: “Move on please.”
It comes after the show was thrown into chaos last week when comedian Andrew Maxwell swore during his live interview.
As he discussed a recent performance, he joked about people bringing their children with them, saying that he was mid “taking the p**s” out of the front row.
Simon and Tim interrupted their guest immediately to apologise for his slip of the tongue.
Andrew also apologise, saying: “I apologise on behalf of everybody. I apologise. For all time.”
Sunday Brunch airs Sundays on Channel 4 at 9.30am.