05/25/2011 AT 7:15 PM ET
Kris and Bruce Jenner found out “a few days” before it happened, Kim’s mom revealed Wednesday during a press day for the family’s show Keeping Up with the Kardashians.
“He came to Bruce and myself and asked us for Kim’s hand in marriage,” says Kris Jenner, “and it was really just so cute the way that he wanted to surprise her.”
Humphries, 26, waited in Kim’s bedroom on bended knee with four words written in red rose petals: “WILL YOU MARRY ME?”
Mom Kris decided to host a family dinner in honor of the occasion – without revealing the reason to the rest of the family.