Some surprising revelations about Mesopotamian celestial deities. *loooong whistle*
ETA much later: Here's the source of the trouble: the author has confused Sin's daughter Nana/Nanaia with Sin's own Sumerian name, Nanna. (And the male Sumerian sun-god Utu with the goddess of spinning, Uttu.) Her thesis about "Sin-Nana" is heavily drawn from
this article about Nana from JAOS (she spells the author's name incorrectly in her references, which tripped me up at first :). So the androgyny she sees in Sin-Nana ("I have heavy breasts... I have a beard") is in fact Inanna/Ishtar's much-noted androgyny.