Heather Has Two Mommies

Blurb

Heather Has Two Mommies is a children's book written by Lesléa Newman with Diana Souza and Dana Kingsbury's illustrations, first published in 1989. Google Books describes it as "the first lesbian-themed children's book ever published".
The story is about a child, Heather, raised by lesbian women: her biological mother, Jane, who gave birth to her after artificial insemination, and her biological mother's same-sex partner, Kate. At Heather's playgroup, her family situation is discussed simply and positively, as are those of other children in other family units.
Lesléa Newman related:
The American Library Association ranked it the 11th most frequently challenged book in the United States in the 1990s; a similar phenomenon can be seen in the Sugartime! episode of the American television series Postcards from Buster. In the 1980s, comparable political controversy erupted in the United Kingdom over the book Jenny Lives with Eric and Martin. Comedian Bill Hicks famously included the book in one of his stand-up routines.
The book and the controversy over it were parodied in the 2006 Dav Pilkey book Captain Underpants and the Preposterous Plight of the Purple Potty People.