It’s a boy for Teen Mom 2 star Kailyn Lowry and Javi Marroquin!

Pregnant Kailyn Lowry Javi Marroquin Isaac

And baby makes four for Teen Mom 2‘s Kailyn Lowry! The 21-year-old and her new husband, Javi Marroquin, welcomed another son—their first child together—on November 16.

Lincoln Marshall Marroquin joins big brother Isaac, 3 (whose dad is Kail’s ex and fellow Teen Mom 2 star Jo Rivera). “I am exhausted, but we are so excited and surprised by our new baby boy,” Kailyn told Us Weekly.

UPDATE – Click here to see a photo of little Lincoln in the arms of his super-proud big brother Isaac!

Kailyn didn’t want to find out her baby’s sex beforehand—sounds like she might have had a suspicion it was going to be a girl. It’s a good thing it turned out to be a boy, however—as of Nov. 9, Kailyn and Javi still hadn’t agreed on a girl’s name! “Changed our boy name, still no girl name for Baby M.,” she tweeted. “It’s getting down to the wire!”

One week later, their 8 lb., 6 oz. bundle of joy was born at 4:28 pm. Congrats to the happy couple!

UPDATE – Kail revealed on Twitter moments ago that she and Javi finally figured out a girl’s name just hours before Lincoln was born!

And apparently the young couple was feeling the pressure to come up with a feminine moniker because according to a post made by Kail on her official Facebook fan page, she and Javi were convinced she was going to need it. “Welcomed baby BOY Lincoln M. Marroquin to the family. So surprised and happy. I think all our friends and family convinced us into thinking we were going to have a girl.”

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