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Teen Mom: Is Pregnancy Contagious? Maybe

Chelsea Houska's BFF may not have much time to babysit anymore.
/ Source: E!online

Chelsea Houska's BFF may not have much time to babysit anymore.

Megan Nelson, Chelsea's onetime housemate on Teen Mom 2, has acknowledged via Twitter that she's expecting her first child with her boyfriend, Cody.

But for all you haters out there, she is not "16 and pregnant" like her pal was.

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"121 days left of my pregnancy :-) :-) going by fast!," she wrote on March 7, one of many baby-themed posts over the last week, most of them responses to a variety of congratulatory and merely curious tweets from friends and her now-fellow Teen Moms.

"No names yet and not 16 &pregnant lol im nineteen," she added.

Apparently Megan is expecting a boy and she says she was not pregnant while shooting Teen Mom 2, in which she and Chelsea shared a house together (before Chelsea's deadbeat baby daddy moved in and spoiled the party).

"Don't you looove how tabloids ask random ppl questions about you like they KNOW you. Where do ppl come up with this stuff?!" she tweeted last Thursday to the not-engaged but in-a-relationship Kailyn Lowry.

Get used to it, kid. Especially when you get your own show, 19 and Impressionable.

GALLERY: Baby Bumpin'