Magic Forums

So maybe 20 minutes ago or something like that I was doing a spell to try to link me and my sisters mind. I'm a witch and my sister is a water fairy. What happened is that when I asked her what message I sent to her to see if I was successful in the linking, she said that I was saying to not do anything dangerous and to be careful. She then got another message that said to get bad grades which I think is just plain old self mind manipulation. So I was wondering what does this mean? I cast a protection spell for caster on myself and an aura hiding from evil spirits spell on the both of us beforehand so I'm not sure. Does anyone know what this means?