The "Teen Mom" family is adding another bundle of joy!  

Catelynn Lowell and Tyler Baltierra are expecting their second child, Lowell's mother, April Stotts confirms to Us Weekly. toofab reached out to the couple's reps, but they haven't commented on the news.

"She called to ask me about a pregnancy test and if I thought she was pregnant," Stotts tells the mag. "So I made her send me a picture and I told her, 'I believe you are, you should go get a couple more and take a couple more.'"

According to her mother, the expecting star is thrilled about the pregnancy news. "She was crying when she knew for sure and so I was like, 'Are you happy? Are you upset?' And she was like I’m happy!,'" Stotts added.

The pair, both 22, put their first child, daughter Carly, up for adoption in May 2009 -- but they are still close to the adoptive parents.

The grandmother-to-be admitted that Catelynn and Tyler are a "little worried what Carly will think because she’s only going to be 5 in a couple of days and what her thoughts will be that they’re having a baby."

Are you surprised by the news? Sound off below, and click "Launch Gallery" above to see more of your favorite "Teen Mom" kids, then and now!

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