By Emma Pearson @journoemma1
Scroll down for the full story
Videographer / Director: Laurentiu Garofeanu
Producer: Emma Lowe
Editor: Sonia Estal
Inspired by voluptuous cartoon character Jessica Rabbit, Penny has sculpted her bust to twice the size of her waist.
In the last two years, 25-year-old Penny has had two boob jobs, taking her from an H to an O cup.
And the military wife has shrunk her waist from 38 to a tiny 23 inches by squeezing into rib-crushing corsets for up to 23 hours a day.
But despite her extreme proportions, Penny has no plans to stop.
She is now preparing for her third boob job and hopes to double the size of her already buxom bosom.
"I've always had a small waist, big hips and large boobs but I'm kind of a 'go hard or go home' sort of person," said Penny.
"I wanted to make my shape significantly more extreme, more dramatic, more stunning and more wonderful."
Shockingly, the corset is so tight that Penny can't eat a proper meal whilst wearing it – as her stomach is so restricted.
Bending, sitting and laying down can also be a struggle.
Driving is very uncomfortable and any form of exercise is totally off-limits while she's trussed up.
Extreme corseting has even been known to rearrange the internal organs, but Penny, a pin-up model, isn't worried.
Instead, she says the curves of her idol are worth any discomfort.
"I've been obsessed with Jessica Rabbit from a really early age," said Penny.
"I think she is incredibly sexy and there's a real power and strength to her character.
"I've always wanted to copy that – at the age of five I was already thinking about breast implants."
Australian Penny, who now lives on the small island of Okinawa, Japan, embarked on her quest for the perfect hourglass figure two years ago.
She wore a corset in February 2012 to pose for some saucy snaps for her husband Cooper, 28, who was deployed overseas with the US Air Force.
But Penny was so fascinated by the effect on her figure that she began corset training – a method that involves shrinking your waist by wearing the tight-laced garment for long periods of time.
For four months Penny wore the corset non-stop, only taking it off to shower.
"It was tough at first," she says. "The corset is not a magical tool that will make your waist tiny in a few months.
"It really was hard work and dedication on my part.
"I stuck to little meals, and also things that incorporate liquid into the food – like smoothies.
"One thing that was difficult was not being able to eat my favourite spicy foods – because they would wreak havoc on my stomach when it was restricted in the corset."
Penny isn't concerned about the disturbing idea that corset training might potentially damage her insides.
She says: "The stomach is an incredibly resilient thing – it can withstand being squashed.
"At first I wore the corset too much and I experienced some pain and discomfort, but now I know how much my body can handle.
"I found it difficult to sleep in the corset at first but it doesn't bother me now."
Within the first four months of corset training, Penny had lost 15 inches from her waist.
As for her chest, in 2012 Penny had her first boob job, taking her from an already ample 34H to a 36J.
But Penny still thought her breasts were too small.
"I've always been obsessed with big boobs," said Penny. "The bigger they are, the better, and I don't think I'll ever be big enough."
A year later Penny went under the knife again to boost her assets a further five cup sizes.
Today, Penny has a 26inch waist and a 55inch bust, and is proud of her figure.
She said: "I love my body and my shape but I'd still like to have more extreme proportions.
"I'd never consider surgery anywhere but my breasts – but I'll keep having breast surgery until my boobs are as big as possible."
Although she still wears the corset every day, it is now only occasionally that she puts it on for 23 hours at a time. And Penny's new shape has dramatically improved her self-confidence.
She explains: "I've suffered with body image issues and low self-esteem for most of my life.
"But when I wear a corset I feel like I'm in armour or wrapped in a safety blanket."
When out of the house, Penny often finds herself surrounded by admirers who want to have their picture taken with her. Penny's husband also embraces her severe curves.
He said: "Penny is as close to Jessica Rabbit as any mere mortal can get.
"Her shape is exciting and interesting. I don't like the ordinary or the generic."
Penny does have her critics, however, and has experienced negativity about her look online.
She said: "Some people don't agree with what I'm doing – they say I'm destroying my body and it doesn't look natural.
"I've even had death threats, but my appearance is for me and I love the way my body looks.
"Jessica Rabbit's figure is sensual, strong and extreme and it's a pleasure to replicate that in real life."