Mary Lambert has expanded her chorus on the Macklemore and Ryan Lewis gay marriage anthem Same Love to a full single.

In Same Love – available on The Heist – Lambert sings the chorus: “And I can't change; even if I tried; even if I wanted to; my love she keeps me warm.”

This week, Lambert released She Keeps Me Warm, a full track that builds on that chorus. (The audio is embedded on this page. Visit our video library for more videos.)

Lambert described the song as “the other side of the Same Love story.”

“I really tried to not be gay at points in my life, but I was (and am) at a point where I refuse to apologize about my identity,” Lambert wrote in a foreword to She Keeps Me Warm. “I am not sorry about my gayness. I am not sorry I'm a Christian, either, though that's far less persecuted than my gayness, which is ironically, instigated by the Christian community.”

“I will not apologize for love. And my God, the God that I believe to be true, would never condemn love like this.”

She Keeps Me Warm is “not political. It's not about oppression or marriage equality. This song is a love song. That's all it is.”

(Related: Rapper Macklemore releases video for gay marriage anthem Same Love.)