They had six daughters: Attallah (b. 1958, named for Attila the Hun);[62][63] Qubilah (b. 1960, named for Kublai Khan);[64] Ilyasah (b. 1962, named for Elijah Muhammad);[65] Gamilah Lumumba (b. 1964, named for Patrice Lumumba);[66] and twins Malikah and Malaak (b. 1965 after their father's death, and named for him).[67]
As the image of the apparently white woman holding a something like six month old infant in that photograph from the NOI publication shows, which publication was dated April 1962 depicting a meeting in February...it's doubtful that the woman and the child shown are Mrs MX and one of her several daughters.
It's possible what we see here is the au pair and the little boy she showed to Susan. Stanley Ann Dunham once made a rather enigmatic comment to a friend...she said; I don't need to get married to have a baby... doesn't anyone remember that?