Rory Feek on mourning wife Joey: 'I don't know if I expected it to be as heavy as it is'

POTTSVILLE, Tenn., Sept. 6 (UPI) -- Rory Feek continues to mourn his wife Joey Feek after her heartbreaking battle with cancer came to an end this past March.

"I don't know if I expected it to be as heavy as it is, because we had so much time to prepare for it," Rory said in a new interview with CBS' Sunday Morning "But I think it's that heavy when she's that wonderful."

Rory even revealed how he has been unable to purchase a headstone for Joey's final resting place located on their farm in Pottsville, Tenn.

"I don't know why, I just can't," the singer said. "I don't know if it's that she's so simple, and a wooden cross is part of what she would like. It probably has something to do with permanence. So, for now, I can sit out here and feel like it's — it's maybe just temporary. Although I know it's not."

The country stars made up singing duo Joey + Rory and are parents to 2-year-old Indiana. Joey was diagnosed with terminal cervical cancer in 2014 with Rory updating fans on her health status on the couple's official website throughout her treatment.

Now Joey is working on a documentary about their story entitled To Joey, With Love. "This whole experience of making the film has been incredible because I get to see Joey every day," he explained. A trailer for the film was released in June.

The couple's last album, Hymns That Are Important released earlier this year but according to Rory, he isn't ready quite yet to get back into the studio.

"I don't want to go on stage without her," he said. "That's what I'm thinking about right now. I just don't want to make music without her. But I also know time changes things. So I won't say never. It's just where I am today."