A perfect weekend

Last year I had a great time a weekend. All was perfect.

First of all, on Friday afternoon my mum was acting strangely and she was telling me I had to do my homework. Then I started studying, but I was a little confused. On the evening, someone rang the door. I was finishing my homework, so my mum opened the door. Guess who came in? My cousin and my aunt from Greece! I was so happy! They stayed for the weekend and they left on Monday, because she had to go to school.