A very dominant thick girl in my Y8 DD's class has got hold of a copy of Fifty Shades of Grey and has been reading it out loud to classmates at school, during break and lunchtimes. I'm pretty relaxed about sexual stuff in general and realise that we were all sniggering at Judy Blume's "Forever" at a similar age back in the 80s - but I'm less than thrilled at the idea my 13 year old being exposed to BDSM at school (as, I'm sure, are the parents of many other class members who are strictly religious - it's an all girls school with a very high proportion of ethnic minority students).
Should I speak to the Head of Year or am I overreacting?