I am a parent and have endured many difficult and stressful situations with my children. I have never ever felt like it was their fault. I never questioned if I would be there for them or not, it never entered my head to be anything other than their mum. You really don't need to feel guilty about any of it. It what normal families do, be there for each other. I would be sad to think my kids felt guilty about something they have no control over or felt like a burden to me. As parents we feel sad that we can not always take your pain and suffering away. Please don't feel guilty. You have nothing to be guilty for.