In a now-deleted Instagram Story, Stacey expressed how unhappy she was with Michael and KC using her sons Nerf gun, demanding she gets it back.
But the rage soon turned to KC, who Stacey has accused of copying her by wearing the same Stuart Weitzman boots that she owns, as well as frequently staying in the same hotel in Melbourne, Crown Towers, which Stacey likes to visit.
But KC wasn't having it, responding with her own rant on Instagram.
"I'm really, really over explaining myself but again, here I am. Firstly, apologies that it was her son's Nerf gun that we used in the video," KC said, who assumed the toy belonged to Michael's two-year-old son, Connor.
KC then explained that she owned the boots in 2018, with photo proof.
KC also said that she stayed at Crown Towers, a hotel that Stacey stays during her fortnightly business trips to Melbourne, for work purposes.
"Stop thinking everything is about you, because it's not. I wished you well, I've never come out and said anything nasty about you. If you could just leave me alone, that'd be really good," she concluded.
KC also shared with her fans a screenshot of her private message to Stacey, where she called KC an 'escort'.
"I'm not sure if I'm looking at an escort page," Stacey said in response to KC in the boots.
"Mean girl much? Calling her out for the mean girl she is! Who puts women down like this?" KC wrote, adding the hashtag #MeanGirlStaceyHampton.
Stacey responded with yet another post to her Instagram Story, which read: "Do not claim to be the bigger person then use a hashtag to put somebody down.
"I've tried to contact her yet she uses social media to call me out. Contact me please."
"I will return the Nerf gun - except I refuse to pay postage. I ain't sending it express."