@raynbow- You are right about the field of social work and family support being very stressful and challenging. My sister is a family support worker, and she has had many ups and downs. However, there is nothing else that she would rather do for a living.
Though your relative should be aware that a position as a support worker will expose her to a lot of challenging, difficult, and emotional situations with families, it sounds like she is more motivated by the rewarding aspects of this field. I think that watching families get through tough times, stay together, and thrive will make the challenging aspects of this career field well worth it for your relative.