Edwin Arroyave is sharing a glimpse into estranged wife Teddi Mellencamp's mental state during her cancer battle. "I think one of the hardest things for her is she really can't work out," Arroyave, 48, shared on the Monday, January 19, episode of iHeartRadio's "The Ed's" podcast. "She's just starting to kind of move her body. But I think that's what's been really tough for her is that obviously she's going through the immunotherapy, which that alone causes some side effects. That's been really hard on her mental health, I think.