Flap33. YOu must be careful when you bring into the arena comments about cabin crew rest on a JFK flight, when your colleagues regularly take "controlled rest", even with a three man crew and bunk rest at the same time.
Why? controlled rest is specifically allowed in FCOs or the new ops manual. No requirement for cabin crew rest is discussed until it is needed for duty extension (which is way further than you think, ie not required to JNB, GRU etc)