Kim Zolciak’s estranged husband, Kroy Biermann, has fears his ex will use a return to Real Housewives of Atlanta to air out their dirty laundry and expose their children to behavior that would be harmful to their wellbeing, RadarOnline.com has learned.Advertising Inquiries: https://redcircle.com/brandsPrivacy & Opt-Out: https://redcircle.com/privacy