Travis, 48, dressed casually in a white t-shirt, black pants, sneakers, and a black beanie and carried headphones as he walked across the parking lot.

The musician had a serious expression on his face during the solo outing.

Meanwhile, Kourtney, 44, has been nestled in their Calabasas home, caring for their three-week-old baby boy.

Earlier this week, Travis was seen again outside his studio carrying a backpack, drumsticks, and a sheet of paper, presumably sheet music.

He wore a black hooded sweatshirt, matching sweatpants, and sunglasses.

Blink-182 recently released their first new album of original music in more than a decade and has been touring to promote it.

The band is taking a break for the holidays but will be back on the road early next year.

‘SO IN LOVE’

While Travis returned to band practice, Kourtney is enjoying her postpartum life.

“Kourtney is so in love,” a source close to the parents told Ok! about the family’s newest addition.

“There hasn’t been one minute where she hasn’t thanked her lucky stars that her baby is here and healthy.”

Kourtney had a difficult pregnancy journey as she was rushed to the hospital and underwent emergency fetal surgery in early September.

The Hulu star said the procedure saved her baby’s life.

“Kourtney is just going to lie low for a very long time and soak in all the baby time,” the insider added.

The Kardashians star gave birth to her son, Rocky Thirteen, at Cedars-Sinai Medical Center in Los Angeles on November 1.

Travis and Kourtney revealed the news a few days later, on November 4.

STRICT RULES

The pair are also each parents to three children with their exes.

Kourtney is a mom to Mason, 13; Penelope, 11; and Reign, eight, with her ex, Scott Disick, 40.

Travis shares Landon, 20; Alabama, 17; and a stepdaughter, Atiana De La Hoya, 24, with his ex-wife, Shanna Moakler, 48.

Despite their large blended family, Kourtney has had a strict ‘invite-only’ rule for anyone visiting her new baby, The U.S. Sun exclusively learned.

“Kourtney is going to be introducing the new baby to her family on an ‘invite-only’ basis,” a source exclusively told The U.S. Sun.

“[Kourtney] and Travis have communicated that they will be taking ‘family only’ time for the newly blended family and for Kourt to rest, and then they will be inviting the extended family over on an individual basis.”

The insider explained that Kourtney is limiting contact with her son to protect him from germs.

7Travis and Kourtney welcomed their son, Rocky Thirteen, on November 1Credit: Getty7Kourtney has been enjoying postpartum life and laying low with her son