Jesy Nelson shares her twins' SMA diagnosis, saying they likely won’t walk and face lifelong challenges.

The eight-month-old twin daughters of former Little Mix member Jesy Nelson have been diagnosed with spinal muscular atrophy, a rare genetic condition that significantly impairs muscle strength and movement. She revealed in a heartfelt Instagram video that the girls will probably never be able to walk and will continue to struggle with breathing and swallowing. Nelson said she has become a full-time caregiver and is grieving the future she once envisioned for her children, calling the diagnosis "overwhelming." When developmental delays were observed, the condition was discovered. Fans and public figures have responded favorably to her heartfelt post.