Watch: 'Teen Mom's Catelynn Lowell Responds to Claim Tyler Baltierra Faked Autism DiagnosisCatelynn Lowell Baltierra's family is carrying on a tradition. The Teen Mom alum's 19-year-old brother Nicholas Radtke revealed that he and his girlfriend Emma Smith are expecting their first child together. "Welp, santa has brought me the greatest gift i've ever received," Nick wrote on Instagram Dec. 25. "i'm having a baby yall." The soon-to-be teen dad also shared a Christmas card with pictures of him and his girlfriend holding a child's onesie outfit, writing alongside the snaps, "We're about to become a family of three! So happy to share that we're expecting! Baby Radtke coming soon!" While neither Catelynn nor her husband Tyler Baltierra-who first appeared on the inaugural season of MTV's reality TV show 16 & Pregnant in 2009-chimed in on the announcement, fellow Teen Mom star Rachel Beaver shared her excitement for the couple. "Congratulations!! you're going to be the best parents," she wrote in the comments section. "I'm so happy for y'all." read Teen Mom's Tyler Baltierra & Catelynn Lowell Respond to Accusations He Faked Autism DiagnosisThroughout the past year, Nick has shared his love for Emma on social media, proving their relationship has been going strong for over a year. In fact, he kicked off 2025 with a picture of the pair together, writing on Instagram, "Going into 2025 with the person i fell in love with in '24." Nick's relationship with Catelynn, however, is a different story. In January, he shared a video on Instagram set to Coldplay's "Sparks" which he captioned, "You know it's bad when people on the internet feel more like siblings then [sic] your actual siblings." Meanwhile, in 2023, Catelynn reacted to Nick's claims that Tyler makes derogatory comments about her weight, including calling her a "heifer." Nicholas Radtke/Instagram"I'm putting this out here because my brother is continuiously [sic] just trying to build this 'fan base' that's based off of lies!" she wrote on Instagram in August 2023. "The ONLY person that has ever called me fat has been YOU!" "I'm sharing this because if he wants to use my name for clout & to get followers," Catelynn continued. "It is what it is, but I at least want those people to know who they're following & what type of person they're actually supporting!" Read on to see what other Teen Mom alums are up to today, including which couples from the MTV series are still together. MTV Catelynn Lowell & Tyler BaltierraViewers watched Catelynn Lowell and now-husband Tyler Baltierra make the difficult choice to place their first daughter, Carly, for adoption, in 2009 on the inaugural season of 16 and Pregnant. After 13 years together, the fan-favorite couple wed in August 2015 and have since had three more daughters: Novalee, Vaeda and Rya. While the absence of Carly-who lives with her adoptive parents, Brandon and Teresa Davis-still aches, the couple keep fighting for a future. Their hope is their bond "is whatever she wants," Catelynn told E! News in January 2025. "Whether she just wants a relationship with her biological siblings, if she wants to have a relationship with us, awesome. If she doesn't, totally understand. Whatever that looks like for her. Because it needs to be adoptee-centered." TwitterMaci Bookout & Ryan EdwardsTogether less than six months when she got pregnant, viewers saw Maci Bookout struggle with an irresponsible Ryan Edwards on 16 and Pregnant. Though they got engaged, the high school sweethearts split less than a year after their son Bentley was born in 2008. These days they're focused on building a co-parenting relationship. "We're in a good place," Maci revealed to E! News in 2023, adding that Ryan is showing up "more consistently now than maybe he ever has before."Instagram Maci Bookout & Taylor McKinneyMaci found her forever teammate in Texan Taylor McKinney in 2012 and the pair soon began building up their squad. They welcomed daughter Jayde in May 2015 and son Maverick a year later, then wed in Florida that October. Partners in parenting, life and their TTM Lifestyle fashion brand, "He's just my person," she told E! News in 2023. "Even when we've had a rough year together, I think at the end of the day, I still choose him. I like him. And even if I want to punch him in the face sometimes, I'd rather argue with him or have a rough patch with him than never have a rough patch with anybody else." Instagram Cheyenne Floyd & Cory WhartonDespite moving on with new significant others, the MTV stars, who connected while filming The Challenge, continue to co-parent their daughter Ryder together. "Our biggest thing since day one of Cory coming into Ryder's life was what kind of dad he wanted to be and what kind of parent he wanted to be," Cheyenne explained to E! News in March 2020. "I wasn't going to allow him to be a Disneyland dad or an Instagram dad or just in the moment. He had to be 100 percent. I think from the beginning, he saw my mindset