She's growing up so fast! "Teen Mom" star Catelynn Lowell officially confirmed her second pregnancy, after months of speculation. Her mother, April Stotts, revealed the pregnancy months ago, and it seemed apparent after her recent Twitter feud with Farrah Abraham. Congrats!

Radar Online notes it was hard to accept Stott's claim as confirmation, as she sold a fake pregnancy story to In Touch in 2012. She allegedly pretended to be Lowell during phone interviews and gave the magazine a forged document announcing the pregnancy.

"I love my mom but this is frustrating," the reality star told the mag. "My mom lied. I think it's because she has no money...so she's trying to sell her daughter."

"Not only does the Teen Mom deny doing the interview, an independent voice analysis by a private investigator revealed 'with beyond a reasonable degree of professional certainty' that the voice of the interview subject "is the voice of the mother,'" In Touch reported.

Lowell confirmed the news on her Instagram account with a black and white photo holding her baby bump, captioned, "#it'sofficial #4months.

She gave up her first child, Carly, now 5, for adoption, but keeps in touch with the family who took her in. The father is Tyler Baltierra, who also appears on the MTV series. The couple were open about trying for another child.

Abraham slammed Lowell after reports of her second pregnancy, dubbing the choice as "poor" in a recent interview.

"I wish them all the best, but it does make me very sad to still see them make poor choices," the sex tape star admitted.

"If I did want to have a family, I would feel secure in showing my family as much love as possible. I bought my own house, I'm starting my own company, I'm doing other things and really just showing that I'm a stable, reliable, great parent. I take that very seriously every day and it's no joke."

"So I hope that with others, who are getting to be pregnant with their second child, that they have a home, that they have a stable financial situation and that they have a supportive family," she continued.

Lowell fired back on twitter, writing, "Huh bad choices?!? Hahaha I didn't make a so called 'sex tape' but WE make the bad choices? Seriously [Farrah's] comments made my night!" 

Are you excited for Lowell and Baltierra? Let us know your thoughts in the comments section below!