I'm gonna go out on a limb and guess that Boy-o's school library book (Wonderwoman's Book of Myths), which contains excerpts such as --
"Zeus had a reputations as a ladies' man. (italics must be read with one's best Barry Manilow voice). He had at least three wives, the last of whom was Hera, as well as a great many love affairs - with mortal women as well as goddesses";
"Zeus' wife Hera was often jealous about her husband;'s affairs with mortal women. She even tried to kill some of his lovers and the children his affairs produced." ;
is chalk full of cartoons with heaving bosoms;
-- was perhaps meant to go home with Boy-o's grade 3 reading buddy?