Kris is extremely upset that Bruce has been dating the 51-year-old mother of two behind her back, reported TMZ.
Bruce and Ronda recently attended an Elton John concert together in Los Angeles earlier this month, said a source.
They were joined by Bruce's son Brandon Jenner and his wife Leah for the outing.
Bruce and Kris split in 2013 after 22 years of marriage in October 2013. Kris filed for divorce from him on September 22, citing irreconcilable differences.