"You're my best friend," Javi tearfully told the equally emotional mother of two as they embraced in front of Isaac and Lincoln (you can relive the scene above). "I love you."
While the couple has been down this road before and spent lengthy periods apart, how does Javi's current work situation contrast from those previous instances?
"This time away is very different because Javi gets to do other things, like he can go to the beach and he can go do cool things," the college student recently told MTV News (as seen in the video above). "Previous times he was away, we weren't able to communicate at all -- so that made things a lot more difficult."
How often do Kailyn and the boys speak with Javi -- and how do they stay in touch? View the clip to find out, and be sure to catch a brand-new episode of Teen Mom 2 on Monday at 10/9c.