Is it considered bullying if you as a parent ask another child in school if they are spreading rumors about your child?

Is it considered bullying if you as a parent ask another child in school if they are spreading rumors about your child?
The schools have their rules and they need to be followed so even if they say it's bullying according to their rules, that does not mean it is outside of the school and by law. But on the school ground you have to follow the rules. Either way was it not appropriate for you as the adult to ask the child directly. You should have spoken to the parents first. There are million of things and games going on between our kids in school that we don't know. Don't forget to ask the teachers. Maybe your child started the whole thing and this is payback. And then you come as a authority, which you are as an adult and parent, and ask something that can be very sensitive. I understand you want to protect your child and end rumors because they can be horrible, but this have to be done parent to parent. And did you expect the child to say "Yes I did it"? of course they wont. And this is another reason parents have to deal with it. We know when they lie. So contact the parents, invite them to dinner and talk it over. Usually children have a much easier time when just being the 2 of them. in school there is so much prestige and you have to be popular. not the same when you are just 2 in the room in your own home.