You've got to be kidding I hope. The woman just didn't know any better. She was doing what a lot of (non-fish) people would do in the same situation. She was wrong to do what she did, but worthy of a slap? I hardly think so. I understand you live with your parents, and you can't control them, but from everything I've read about breeding, you're supposed to leave them in a quiet area with no disturbances, and my parents would have been informed of this, and not to let anyone near the tanks at all.