She was married to her college lover, Blake Dain, but their relationship was not fruitful as the couple broke up after some time due to personal reasons. The main reason for their divorce could be Sinema’s sexuality, as she publicly came out as bisexual in 2005. However, she is very private and would not share her personal details with the media.
She is used to supporting LGBT rights and issues through policy advocacy. Sinema was a leading opponent of a constitutional amendment to the Arizona state constitution that would have banned same-sex unions and marriages in 2006. The first state to reject a ban on same-sex marriage was Arizona .
Despite this, a Second Amendment that simply banned same-sex marriage was approved in 2008, despite continued opposition from Sinema. She favors the recognition of domestic partnership, same-sex unions and the inclusion of gender identity in anti-discrimination legislation.