The season nine star flaunted her svelte figure in the white triangle bikini top and matching bottoms as she posed in front of a pool.
In a second photo posted to Instagram, Olivia strikes a cheeky pose showing off the back of her swimsuit.
Her MAFS co-stars were stunned by Olivia's snaps, with Selina Chhaur commenting: "Dayummmmm lil lady."
Carolina Schimidt said she was, "Looking fire", while Tamara Djordjevic wrote, "HOT".
Fans were also stunned by Olivia's cheeky swimsuit snaps.
"Stunning as always Liv," one said.
"GIRL you look incredible," another comment read.
"Absolutely gorgeous," a third added.
"You look amazing," another fan wrote.
Olivia Frazer's eye-watering OnlyFans salary
It comes after the star revealed the huge salary she is earning since launching her OnlyFans account.
The season nine bride said in an Instagram Story she would not reveal a specific figure, but claimed in her first five months she has made more than she would have in her first five years of teaching.
The entry-level salary for a teacher is around $70,000, meaning Olivia would have earned approximately $350,000 on OnlyFans judging by that figure.
"It took me 25 years to work out I wanted to be a teacher," she said. "I was ambitious and really f**king good at it. Now that's impossible, I'm stuck. I love OnlyFans but know that's not going to last forever.
"For now, I'm just going to pour so much love and energy into that, invest my money wisely and figure it out. Maybe fund some business that would allow me to be creative but I'm going to take my time and be smart."
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