Amanda Shires is not used to sitting still. She enjoys being home in Nashville, but after a few days, she gets restless, which isn't surprising, given that Shires has been a touring musician since her teens, when she began playing fiddle in the Texas Playboys. Later she lent her violin skills to artists like John Prine, Justin Townes Earle and her husband, Jason Isbell.

Amanda Shires is not used to sitting still. She enjoys being home in Nashville, but after a few days, she gets restless, which isn't surprising, given that Shires has been a touring musician since her teens, when she began playing fiddle in the Texas Playboys. Later she lent her violin skills to artists like John Prine, Justin Townes Earle and her husband, Jason Isbell.

Shires, a Texas native, is also a songwriter, releasing a series of Americana albums that feature carefully crafted lyrics (Shires is also a poet) and honeyed vocals with a subtle, here-and-gone vibrato (think Emmylou Harris in a hurry in the other room). Shires' newest, My Piece of Land, is out Friday, Sept. 16 - the same day her current tour brings her to Rumba Café.

Last summer, though, Shires was forced to sit still, unable to travel in the waning days of her first pregnancy. "I tried to keep myself busy the whole time," Shires said by phone recently. "I did all the building of the nursery, putting the crib together and even organized the garage. After everything I could think of was done, I was left to face what can sometimes be fearful about bringing a child into the world."

Those fears began manifesting themselves in songs that would eventually make up her new record. The first song she wrote, the mournful, slide-guitar soaked "Slippin'," finds Shires fretting over what can go wrong in a relationship. "You'll say you have this hollow feeling / Something's always been missing / Tonight could be the night you go slippin' away from me," she sings.

"Sometimes I think that, man, it would really suck if Jason slipped and fell off the wagon," Shires said, referring to her husband's four-year-old sobriety. "And then what would happen? That's the conversation I was having in my head with the listener."

Other anxieties cropped up relating to her identity as a mother, wife and touring musician, as well as the concept of home. "Anywhere you stand is my piece of land," she sings on closing track "You Are My Home."

"I sorta came to an understanding that, for me, our home isn't really at our address," said Shires. "Home is really flexible and fluid for us. It's usually where we all are together."

Now that the couple's daughter, Mercy, is 1, Shires said juggling her roles as mother and musician hasn't been as difficult as she anticipated. "You pack an extra bag, and you put the baby in the bus," she said, laughing. "I think it'll be more challenging in October because we're gonna be separate a lot of times. ... Hopefully I don't lose my mind."