Mary Cheney Headlines Marriage Fundraiser

In the midst of a public flap with her sister over the right for same-sex couples to marry, Mary Cheney announced plans to headline a fundraiser for Freedom Indiana.

The fundraiser, scheduled for December 11, will support efforts to fight a proposed amendment barring marriage equality in the state, the Indianapolis Star reports.

"No one should be denied the fundamental liberties we all deserve," Cheney said on Tuesday in a message to Freedom Indiana supporters. "There's nothing I wouldn't do to protect my wife Heather and our two children. And then I think about the thousands of same-sex couples and their families in Indiana who would be directly impacted by HJR-6. I'm committed to standing together and working across party lines to keep this amendment out of Indiana's constitution."

Cheney married her longtime partner Heather Poe in 2012. Together, they are raising two children, and they reside in Virginia.

Earlier this month, her sister Liz Cheney, a U.S. Senate hopeful for Wyoming, said she opposed a federal constitutional amendment to ban same-sex marriage and supported the State Department's offering of benefits to same-sex partners of employees, but she also said she endorsed "the traditional definition of marriage." She reiterated that she loved her sister Mary.

However Mary Cheney countered on her Facebook page, "Liz -- this isn't just an issue on which we disagree -- you're just wrong -- and on the wrong side of history." Poe also said on Facebook that Liz Cheney's words were offensive.