Boy Meets World’s Trina McGee on Her ‘Miracle’ of Pregnancy at 54 (Exclusive) [Video]

Trina McGee is getting ready to embark on a new journey as a mom.

The Boy Meets World alum shares her three adult children — Ramia, 31, Langston, 29, and Ezra, 25 — with her first husband, actor Courtland Davis. Now, she is expecting her first child with her current husband of 16 years, Marcello Thedford, at 54 years old. (Thedford also is a dad to son Elijah through a previous relationship.)

McGee shares that her fourth pregnancy was “completely natural” after taking a more holistic approach, but it still comes as a “shock” to her.

“I just kept saying, ‘Is this really happening?’ I still do that. ‘Is this really happening?’ But it is,” she tells PEOPLE exclusively. “Then, I’ll get sick, or I’ll do something weird [and] it has to do with pregnancy. And I’m like, ‘This is really happening.’ And I’m remembering all the other times when I was pregnant, you know, 25 …