That's amazing that none of your children stutter, I've read here it seems like many people who have more than 1 child, often at least 1 inherits it. So it's a fear of mine. But like you, my parents don't stutter, neither does my brother, supposedly I had a grandparent & great-grandparent who did, although I've never heard it even when they were alive. I think it's both genetic and environmental, and I do wonder if mine was greatly environmental because I have a mother with severe BPD and would always interrupt me & literally yell over me, so I would always rush to speak & that;s when the stutter started. Then my dad would bully me about it, instilling shame & the mental hang-up.. then it was permanent