"It's accepted at any major beach in Australia, so why wouldn't it be accepted here in Zetland in the middle of Sydney," Kristy Miller said on A Current Affair on Wednesday night.
Kristy, 39, was spending her day off by the pool at her Zetland apartment building when the security guard confronted her.
"I was in my bikini sunbathing when I was approached by security and told my swimwear wasn't appropriate and to go and put some shorts on if I wanted to stay at the pool," she said.
"I thought it was a joke. I couldn't believe it."
She was shocked after being told her swimwear was "too cheeky" and that she should've been wearing a "full brief".
While there is a sign on the pool door saying no G-strings or topless sunbathing, it simply asks residents to dress "adequately" which seems to have left a lot of people confused.
"I just think it is crazy that security guards are patrolling pools, looking at women's bikini bottoms and judging whether they think it is suitable or not. What gives them the right?" Kristy said.
"There are no rules for men, not once did they go and attack any man. Men were fine to wear speedos, but women's bikini bottoms are not okay."
However, it seems as though Kristy is not the only one this has happened to.
After taking to a local community Facebook group, Kristy received a number of messages saying they've experienced similar treatment over the last three years.
"Several women have felt attacked or victimised — women have even moved out of the complex. Another woman is now banned from the pool area," she said.
Kristy joked that she may even buy a skimpier bikini, "The residents on the group chat were all talking about us doing a flash mob or something, congregating down there to really prove a point."
"I am willing to go all the way with this, to stand up so women don't feel ashamed of what they are wearing, and they can wear a bikini," she added.
Prime Minister Scott Morrison has even weighed in on the controversy.
"I thought they always could (wear what they want) I was not aware that any of that had been constricted," he said on 2GB on Thursday morning.
"I’m surprised that it even applied. I tell you what though, as the father of daughters I might have some dress standards and conditions, but that’s for the family."
Another resident of the same apartment complex tells Yahoo Lifestyle: "I'm so glad that Kristy has spoken out about this topic. The complex is very secure which is great, but with that we should be allowed to relax and enjoy the pools provided.
"There's an awesome BBQ area which is perfect for entertaining, yet no alcohol - or even music (no matter how quiet) - is allowed there.
“It's about time some of these rules were relaxed, as it seems such a shame, especially at the moment when connection means everything."
Another person living in the building shared two photo of the building’s updated rules with Yahoo Lifestyle, and said about one of them, "This is the elevator [sign], I actually think they changed it last week or so, because when I first moved in there was one specifically saying no G-strings or topless."