• Taylor McKinney cradles Maci Bookout's baby bump.

Taylor McKinney cradles Maci Bookout's baby bump. (Photo : Maci Bookout/Instagram)

Maci Bookout just announced her engagement to Taylor McKinney weeks ago, but already, the “Teen Mom OG” couple has made arrangements to expand their family.

On Feb. 14, Bookout took to Instagram, where she revealed to fans that she and her fiancé would soon welcome their second child together, the third for Bookout, who also has a 7-year-old son with ex-fiancé, Ryan Edwards.

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“#MakingMoreMoneys,” Bookout captioned a photo of her baby bump, which McKinney was seen cradling. “Baby boy coming soon! Happy Valentine’s Day @tmon3yyy #lastbutnotleast.”

Bookout and McKinney began dating about three years ago, following Bookout’s split from ex-boyfriend, Kyle King, who fans often saw on “Teen Mom,” and early last year, they debuted their relationship on the MTV reboot of “Teen Mom,” “Teen Mom OG.”

During the first installment of the new series, which follows Bookout, along with Catelynn Lowell, Amber Portwood and Farrah Abraham, as she navigates through life as a young mother, Bookout and McKinney announced they were expecting their first child together, daughter Jayde Carter McKinney, born May 2015.

Throughout the second installment, Bookout made in no secret that she desired to marry McKinney, but on the show, he failed to propose. He did, however, pop the question just weeks ago, following filming on the currently-airing installment. At the time, Bookout first shared her exciting news with MTV, and later posted a photo of her engagement ring on Instagram.

As Bookout and McKinney continue to expand their family, Bookout’s ex, Edwards, has been far less successful in finding love. Although Edwards seemed to debut a new relationship earlier this year on Instagram, with a series of photos of a brunette woman, he never confirmed the news with fans, and has since deleted all traces of his mystery girl from social media.

For more of Maci Bookout and Taylor McKinney, tune into “Teen Mom OG,” airing on Monday nights at 10 p.m. on MTV, and check out the video clip below for more details on their daughter.