ɹᵻpˈoːɹɾᵻdli, kˈæθɹɪn ænd tʃˈɑːɹlz hæd ɐ fɹˈɛndli ɹᵻlˈeɪʃənʃˌɪp, bˌʌt dˈuː tə hɜː jˈuːθ, kˈæθɹɪn dɪdnˌɑːt lˈɪv wɪð tʃˈɑːɹlz bˌʌt wʌz hˈændᵻd ˌoʊvɚ tə ðə kˈɛɹ ʌv hɜː spˈaʊsᵻz mˈʌðɚɹ ˌɪseɪbˈɛlə ʌv pˈoːɹtʃəɡəl, dˈʌtʃɛs ʌv bˈɜːɡʌndi, wɪð hˈuːm ʃiː ɐpˈæɹəntli ɡɑːt ɐlˈɔŋ vˈɛɹi wˈɛl, bˌiːɪŋ tɹˈiːɾᵻd lˈaɪk ɐ sˈʌbstɪtˌuːt dˈɔːɾɚ.
Reportedly, Catherine and Charles had a friendly relationship, but due to her youth, Catherine did not live with Charles but was handed over to the care of her spouse's mother Isabella of Portugal, Duchess of Burgundy, with whom she apparently got along very well, being treated like a substitute daughter.