"Soooo I caved and did a maternity shoot," Jason Aldean's wife Brittany, who's expecting a daughter with the country singer, wrote on Instagram

Navy Rome is almost here!

Jason Aldean‘s wife Brittany recently posed for a stunning maternity shoot ahead of their second child’s birth, donning a variety of outfits in solo snaps and some with 13-month-old Memphis, her son with the country singer.

In two black-and-white portraits shared with PEOPLE, the mom-to-be shows off her baby bump in an all-black getup: a high-neck gown featuring a thigh-high slit and matching wide-brimmed hat.

A more brightly lit snap, in color, shows Brittany and Memphis in bed, flashing huge smiles as she cradles her belly in a long-sleeved cream-colored top. Both sets of shots were taken by Nashville, Tennessee-based photographer Nanda Santos.

“Soooo I caved and did a maternity shoot. Y’all are right … I’m glad I did♥️,” the 31-year-old captioned the latter photograph, referring to her initial hesitance in doing the shoot since she was already far along in her pregnancy. (Baby Navy is due in February.)

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Credit: Nanda Santos Photography
Brittany Kerr Aldean
| Credit: Nanda Santos Photography

A professional photograph posted Wednesday, depicting Brittany and Memphis in front of a window, included a heartfelt caption from the soon-to-be mother of two that expressed gratitude for her journey toward parenthood.

“Yesterday Jase and I passed the fertility center that was basically our second home for over a year and a half,” wrote Brittany, referring to her and Aldean’s in vitro fertilization journey with their son and daughter on the way. “The memories came rushing back … so many smiles and so many tears during that time. Yes, there was loss but there was also success.”

Brittany Kerr Aldean
| Credit: Nanda Santos Photography
The 52nd Annual CMA Awards - Arrivals
Jason Aldean and wife Brittany
| Credit: Terry Wyatt/FilmMagic

“As I look through these photos I can’t believe that we are about to have our second baby. WHAT A BLESSING♥️,” she continued. “Our hearts are so full and we are so excited but I wanted to take a second and say to the families/ladies that are praying for a child … that would do ANYTHING to become pregnant … I understand your struggle and pray that you know you are not alone♥️♥️♥️”

Jason Aldean and family
| Credit: Darling Juliet Photography

On Thursday, Brittany showed off the nursery she and Aldean, 41, had put the final touches on for little Navy before she completes their family of six (the “You Make It Easy” singer is also dad to daughters Kendyl, 11, and Keeley, 15).

Standing out among the room’s lavender furniture and accents, the centerpiece was undoubtedly a blue neon “Navy” sign sitting behind the crib — a throwback to the sweet way the couple chose to reveal their daughter’s name at their baby shower late last year.

“I wanted it to be girly but with a little bit of edge. So we did the lavender accents but we also did this accent wall in navy with gold glitter,” Brittany explained, giving her followers a close-up view.