I voted “no” since, even though an unknown number of women experience spontaneous change in sexual orientation, there is no evidence that common sense methods or psychotherapy can help people change their sexual orientation.
To explore this issue further, I would suggest the following resources.
Appropriate Therapeutic Responses to Sexual Orientation – This is the most comprehensive review of sexual orientation change efforts (SOCEs) to date. The authors found the evidence for change underwhelming, but observed also that gay affirmative therapy is not appropriate for all clients. They recommend helping clients gain more self-determination by working with them to develop a sexual orientation identity that is consonant with their values.
Ex-gay Research: Analyzing the Spitzer Study And Its Relation to Science, Religion, Politics And Culture – A collection of papers about the infamous Spitzer (2003) study. Represents fairly and accurately the two sides of the controversy between the APA and NARTH.
Ex-gays? A Longitudinal Study of Religiously Mediated Change in Sexual Orientation – The best study on SOCEs so far, despite some major methodological flaws. The most telling result is that success was not defined as change from homosexuality to heterosexuality, but as change from homosexuality-or-bisexuality to a “meaningful if complicated heterosexuality.”