Her first child, daughter Mongo (short for Mongoloid), has Down syndrome and is being cared for by Precious' grandmother, though Mary forces the family to pretend that Mongo lives with her and Precious so she can receive extra money from the government.
Anak pertamanya, "Mongo" (singkatan dari Mongoloid), menderita sindrom Down dan dirawat oleh nenek Precious, meskipun Mary memaksa keluarganya berpura-pura bahwa Mongo tinggal bersamanya dan Precious sehingga ia dapat menerima uang tambahan dari pemerintah.