Jamie Lynn Spears and her fiance Casey Aldridge are in full-on nesting mode.
The parents-to-be, who recently purchased their first home together in Liberty, Miss., are preparing for the imminent birth of their child, sources tell PEOPLE.
"They're very happy," says a source. "They're a fun little couple."
To get settled in their new home, Spears, 17, and Aldridge, 19, recently had furniture - including an elaborately carved four-poster king-size canopy bed, a leather recliner, and a leather sofa - delivered to the house.
Spears's mom, Lynne, is helping her daughter decorate the nursery, with the color scheme of pink, brown, and "silver-green," says an insider.
Spears, who is due to give birth soon, has been keeping a low profile as she readies the new house for her baby. The five-acre Liberty property is already equipped with a barn and studio, which was formerly used as a hair salon.
One new neighbor, who has already offered to babysit, says, "They're just a sweet little old couple."
Spears and Aldridge, who got engaged in March, plan to wed after the baby is born.
Lynne's in Kentwood???