It's the moment "This Is Us" fans have been waiting for since the ending of Season 2: Who is 'her'?The identity of this woman was finally revealed in the final seconds of the Season 3 finale on Tuesday night.It's Rebecca Pearson, (Mandy Moore), but many years into the future and she appears to be on her deathbed.Her children and their families appear to be gathering to say their goodbyes. Noticeably absent is her husband, Miguel Rivas (Jon Huertas), whom she married after her late husband, Jack Pearson (Milo Ventimiglia), died. Instead, sitting beside her hospital bed is Nicholas "Nicky" Pearson (Michael Angarano), Jack's estranged baby brother. What we also learn is that Rebecca is not in the hospital, she is at her son, Kevin Pearson's (Justin Hartley) home. We also discover that Kevin has a son of his own but we don't know with who. Could it be that he and his longtime girlfriend, Sophie (Alexandra Breckenridge), got back together? Earlier in the episode we find out that Kevin and Zoe Baker (Melanie Liburd) split because she is adamant about not wanting children. A popular fan theory was that "her" was possibly Beth Pearson (Susan Kelechi Watson), since much of season three focused on her marital problems with her husband, Randall Pearson (Sterling K. Brown). But with a quick peck on the lips and a flash of her wedding ring during the flash forward, viewers' fears were quickly erased. One unsettling moment came when Toby Damon (Chris Sullivan) arrived to Kevin's home alone, leaving some viewers wondering if he and his wife, Read More – Source
[contf] [contfnew] 
CNN
[contfnewc] [contfnewc]
