'Teen Mom' Javi Marroquin and girlfriend Lauren Comeau welcome second baby: 'Sissy is here'

The couple are already parents to a son Eli, 5 years old

Javi Marroquin's family is growing with a new one!

THE Teen Mom 2 alumnus, 31, and his girlfriend Lauren Comeau welcomed their second baby together, a girl, sharing the news in a joint Instagram post.

In the photo, Marroquin and Comeau can be seen holding their newborn daughter in seven different Polaroid photos, one of which features Marroquin's son Lincoln, 10, whom he shares with ex Kailyn Lowry.

Marroquin and Comeau's 5-year-old son Eli can also be seen in the family photo, smiling among his siblings. “Sissy is here! Our sweet sister arrived last night and we are all head over heels in love ,” the couple captioned their post.

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Related: Teen momJavi Marroquin and his girlfriend Lauren Comeau are expecting their second baby, a girl: “Christmas came early”

In December, Marroquin and Comeau announced that they were expecting their second baby together, announcing the news on Instagram.

“Christmas came early and we got our greatest wish ”, we can read in the caption. “Little sister coming this summer and we couldn't be happier .”

In November, Marroquin and Lowry celebrated Lincoln's 10th birthday.

“HAPPY 10th BIRTHDAY to the big buddy! A decade…wow! I love you so much and I'm so proud of who you are. Well done my boy ,” the proud dad captioned the photos shared on Instagram.

On her own Instagram, Lowry shared photos from Lincoln's basketball-themed birthday party, writing, “There's something about this one he makes me so proud. 10? !? where does the time go? #10 HAPPY BIRTHDAY TO MY BABY!

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