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Bravo reality star Brielle Biermann is claiming that her step-father Kroy "walked in on her", while she was having s*x with a young man.

Brielle is the daughter of former Housewife Kim Zolciak-Beirman and step-daughter to husband Kroy Biermann.

The reality star daughter admitted on the season premiere of Don't be Tardy that her adopted father caught her in a compromising position.

The 21-year-old social media star was discussing how "strict" Kroy is with her younger sister Ariana. During the discussion Brielle spilled some of the family tea, saying, 'At least Kroy has never walked in on you.'

Brielle didn't go any further with what happened - but they have already got people talking on social media.

Many are suggesting that Kroy should "knock", especially when walking into the room of an adult non-biological daughter.

Hopefully we'll hear MORE about that day on this season of Don't Be Tardy which airs tonight on Bravo at 9PM.

Recently Brielle sat down with PEOPLE Now this week, the 21-year-old Don’t Be Tardystar opened up about her split from boyfriend Michael Kopech, 22, last March after almost two years together, revealing there is little to no chance of a reconciliation.

“We don’t even speak, so that’s just so foreign to me right now,” she said. “I probably would never [get back together with him]. But never say never. He’s doing great in his life and with his new girlfriend or whatever is going on there.” (Kopech, a Chicago White Sox pitcher, is now dating Riverdale star Vanessa Morgan, 26.)