You were in your room playing your guitar rather loudly filling the whole room with the music. Your mom came in, at first you didn't hear her before she shouted at you, when you stopped your music she said "We have guests over, they'll be here in a few please be nice and polite to them okay?" she also adds that their son would also be there he was about your age.

But you just wanted to play your guitar in peace without anyone bothering you. As your mother left you continued to play the guitar.