As Joey Feek's courageous cancer battle continues, Rory Feek is opening up about the future.
Speaking exclusively with ET, Rory says he won't continue to make music without his wife by his side.
"This is the last record that Joey and I will ever get to make and the last songs we'll ever get to sing together," he says of their new album, Hymns That Are Important To Us, out Feb. 12. A deluxe version, with never-before-seen images, is exclusively available at Cracker Barrel. "I have no desire to go on singing or performing without her."
WATCH: Rory Feek Details Joey Feek's 'Excitement and Tears' After Learning of GRAMMY Nomination
Rory reveals that the couple's daughter, Indiana, who will celebrate her second birthday next month, is already well versed in the tracks on the album.
"Her mama rocked her to sleep singing them and has even taught Indy how to sing along with sign language on 'Jesus Loves Me,'" he says. "Joey singing these songs is a big part of Indy's life so far, and I know that these songs will go on to be very important to her as she grows up and is able to hear Joey still singing them to her when we play the album."
Rory explains that while the album's tracks were recorded at a studio in Nashville, Joey laid down most of her final vocals in a Georgia hotel room while undergoing chemo and radiation last year.
In addition to Hymns, Joey + Rory will release a DVD "not long" after the album hits shelves.
"It's a live concert Joey and I filmed in September at our farm, and also interviews we did with Bill Gaither in October. Joey was still going through chemo and radiation as we recorded them, so it was hard on her," he recalls. "But she just kept smiling and pushed through it because this project is so important to her.
"I sat beside Joey's bed and watched the final edit of the DVD with her a couple of weeks ago," he continues. "We were both moved to tears. It's very special."
WATCH: Rory Feek Says Daughter Indiana Is Keeping Joey Laughing as Her Condition Declines
Rory has kept fans and well-wishers up to date on Joey's condition through regular posts on his blog, This Life I Live. Recently, the singer-songwriter confessed that his wife's condition had continued to "decline" and wrote, "I'd like to tell you that she's doing great and is going to beat this thing. But I can't."
"We've received hundreds, if not thousands of letters and cards and gifts that people have sent to us through all of this," Rory tells ET. "Many of them tell stories of their struggles with cancer, their families, and their faith. They write and share their hearts with us to encourage us, just as we strive to encourage them through our journey and my blog."