Jenni Farley and Roger Mathews are now the proud parents of TWO -- and the doting dad played a special role in bringing his boy into the world on D-day.

"Yesterday at 6:03 pm (with the help of my assistant Dr. Rezai and my wonderful staff) I delivered our 7lb 2ounce son Greyson Valor Mathews into the world," the proud Jersey papa captioned the photograph below from the delivery room.

From there, the gentle giant recounted the unforgettable, fast-moving chain of events and his involvement before Baby G made his triumphant arrival. "Moments after my wife @jwoww water broke Dr. Rezai looked at me and said "Scrub up Stat! You're gonna deliver your son. Ok so I made up the 'Scrub up Stat' part but In my head he said it."

Roger couldn't help but reflect on the remarkable occasion -- and tug on those heartstrings with his touching words. "Life is only gonna offer you opportunities like this once so you better capitalize on it," he continued. "I would describe the experience like doing 3 back to back combat tours in Iraq while winning the Nobel Peace Prize simultaneously.

"What an amazing experience to literally witness the miracle of life from the very onset. He's our little man, our perfect bundle of joy, the baby brother to an anxious little girl ready to met her Bubba. What a ride this thing called life is ladies and gentlemen. Thank you for the love and support for our newest chapter. We are blessed and we pray health and happiness finds you in reading this."

In addition, Nicole Polizzi congratulated her dear Snooki & JWOWW sidekick on her second addition -- with her trademark humor, of course.

Be sure to share your well wishes for the Mathews clan in the comments! And for a sweet rewind, relive Meilani's special arrival in the S & J video below.