Maci Bookout’s son is almost the same age she was when she had him.

In fact, the children of the original Teen Mom cast—including those of Amber Portwood, Ashley Jones, Briana DeJesus, Catelynn Baltierra, Cheyenne Davis, Jade Cline, Leah Messer and Mackenzie McKee—are all approaching their sweet 16th birthdays.

And in an exclusive clip of the upcoming special, full-circle season of Teen Mom: The Next Chapter, Maci’s son Bentley experiences a startling realization as she points out to him, “You’re turning 16.”

Which causes the teen to tell his mom, “I don’t know what I’d do if I had a kid right now.”

The preview for the season—which premieres January 30th—features a number of coming-of-age milestones for the parents and teens alike, from attending prom, to learning to drive and planning for college.

But alongside all the new moments is a look back at where the series’ leads started: At them preparing to welcome new life into the world as 16-year-olds.

As a throwback clip shows Catelynn asking the cameras, “How am I supposed to raise a kid when I’m a kid myself?”