I am self employed. I work from home. It can only be done at home, unless I lug massive bits of equipment away with me (I can't work from a hotel room for example).
My children are Secondary school age. They don't need looking after, just someone around really in school holidays.
Every school holiday from my parents...
What are you doing? (I'm working)
What are the children (homework, chilling, hanging out, resting. )
Why don't you come and stay for a few days (I'm WORKING)
What do you do all day at home (WORK)
Don't you want to spend time with the children (I do in the afternoon/evenings, I start work early...).
I'm pretty sure if I worked in an office I wouldn't get this barrage of questions!