Sorry Miss/Sir, just intruding into your staffroom 
My younger sister is in year 8, it's her parents evening in January. At our school, GCSEs are studied over 3 years (so y9-y11), meaning that GCSE options are chosen in y8, so parents' evening is, I guess, pretty important this year.
My dad's ill and has a hospital appointment that afternoon, and my mum will be going with him. This will probably mean that neither of them can go to my sister's parents evening. I've agreed with my parents to go instead... the only thing is, I'm in y12 at the same school. I have a couple of the same teachers as my sister as well. Would you, as a teacher, have a problem with this?