Kailyn Lowry is preparing to welcome her third child with a third man and as she nears her due date and the Teen Mom 2 star is reportedly determined to be the "best mom."

According to a source, Lowry has learned a lot from her two older children, seven-year-old Isaac and three-year-old Lincoln. She also feels completely capable of welcoming a third child into their family.

With each child, "[Kailyn Lowry] feels that she becomes a better mom with more knowledge and parenting skills," a source told Hollywood Life on Saturday. "Although she's somewhat terrified about being a single parent, she feels much more confident when it comes to her mothering abilities this time around. Kailyn has the whole baby routine sorted like it's second nature to her!"

Lowry welcomed her first child with her ex-boyfriend, Jo Rivera, while filming 16 & Pregnant and years later, while married to Javi Marroquin, she welcomed her second child.

"She knows exactly what to do when the baby won't stop crying, or when they won't feed," the source continued. "She's much less panicked, which makes the baby feel calmer too. Kailyn is working hard to eliminate as much drama from her life as possible. The kids always come first, so she's got her priorities straight!"

In other Kailyn Lowry news, she and her co-stars will soon be seen back on MTV with a new co-star, Briana DeJesus, who has been added to the eighth season of Teen Mom 2 as the fifth personality.

Teen Mom 2 season eight, which also includes Leah Messer, Chelsea Houska and Jenelle Evans, premieres next Monday night, July 17, at 9 p.m. on MTV.

Check out a sneak peek at the new season of Teen Mom 2 below.

Tags: kailyn Lowry Teen Mom 2 MTV Reality TV