mˈɪsɪz. tɹˈɛnθæm sˈɛndz ɐ lˈɛɾɚ tə dˈænjəl ɹᵻvˈiːlɪŋ ðæt kˈæθi ɪz ɡˈaɪz tʃˈaɪld ænd ðˈɛɹfoːɹ hɪz bˌaɪəlˈɑːdʒɪkəl sˈɪstɚ.
Mrs. Trentham sends a letter to Daniel revealing that Cathy is Guy's child and therefore his biological sister.