celebrated her 17th birthday with fiancé shopping at Wal-Mart and having dinner at Ruby Tuesday, People states. Really. Which is great. In fact, we support whatever makes America’s favorite unwed teen mom-to-be and teen baby-daddy happy. “They both seemed really happy, both in really good moods,” a source tells People of the […]

celebrated her 17th birthday with fiancé shopping at Wal-Mart and having dinner at Ruby Tuesday, People states.

Really. Which is great. In fact, we support whatever makes America’s favorite unwed teen mom-to-be and teen baby-daddy happy.

“They both seemed really happy, both in really good moods,” a source tells People of the couple’s outing near Aldridge’s home in Liberty, Miss.

“Jamie Lynn had a big smile on her face.”

With Wal-Mart purchases in hand, Spears, who is pregnant with Aldridge’s child, took in a with Casey, 18, at the restaurant.

“It was just the two of them,” says the source.

“They were like a tiny adult couple, very low-key.”

Casey Aldridge and Jamie Lynn Spears

recently has been flashing a huge from . They’re anticipating their baby this summer.

Meanwhile in Los Angeles, Jamie Lynn’s large sis gathered with the rest of the Spears clan for a family dinner in Los Angeles.

Britney, parents Lynne and Jamie and brother Bryan Spears joined a group of about 10 people for an Italian feast at Ristorante Peppone in Brentwood.

“[Britney Spears] was in a great mood, and had dinner with her family and friends,” a says.

Via [thehollywoodgossip]