The 26-year-old reality star died on Jan. 16. ‘Teen Mom OG’s Catelyn Baltierra joins ‘16 and Pregnant’s Abygail to give advice ahead of her episode, airing at 9 p.m. ET/PT on MTV.

Underwood never appeared on screen during Abraham's 16 and Pregnant episode, which aired in 2009, since the pair had broken up before she learned she was expecting. In July 2024, Us Weekly ...