Leah mentions Jaylan in Teen Mom: Family Reunion, but it isn't until close to the end of the season that he finally makes an appearance. It's Jaylan's first time on any show in the Teen Mom franchise, and when he arrives at the resort where Leah and the other moms and their guests are staying, she's overjoyed to see her new beau.
She's excited to introduce Jaylan to the rest of the group, but she also says she's "anxious" because getting back into the dating scene is a risk and she realizes it. Still, if Leah is ready to bring Jaylan into the unpredictable world of Teen Mom, then he must be pretty important to her.