The evidence that I have found surrounding her life does not support that story of her birth. I believe she was a ligitamate child. Her parents, Benjamin Monroe Hawver and Magdalena Marie Gall, were married on 15 April 1900 in San Francisco. Here is a mention of their marriage in the San Francisco Call on 16 April 1900:
His name is misspelled, but it usually is in most of the records that I find. Around 9 months later, on 6 January 1901, Beatrice was born in Floriston. Here is the mention in the San Francisco Call on 18 January 1901:
Before she died, Beatrice wrote down in a note where she was born, and she said it was Floriston, not San Francisco, which is consistent with the newspaper. If she was born in Floriston, why would the supposed prostitute mother move with Benjamin and his new wife from San Francisco to Floriston and then hand the baby over? Even without a birth certificate to say conclusively who her mother was, I think that I have enough evidence to disprove the prostitute story.