Based on statements such as "depressive episodes" and such, it seems in this case more like people with complementary disabilities. His body struggles, her mind

Based on statements such as "depressive episodes" and such, it seems in this case more like people with complementary disabilities. His body struggles, her mind struggles, they can each support the others' "weakness" as it were. Maybe that's the key really, because they're both caretakers of the other.