SIL !!!

DD and SIL have recently bought 52" (yes that's right) screen TV with surround sound 3D and heavens knows what else.
SIL bought Skyfall DVD and invited DH and I for a movie night. I took nibbles and drinks. DGCx2 tucked up in bed, lights off and we settle down for the evening.
10mins into the film SIL starts snoring!!!! And continues to do so all the way through.
Rude don't you think? He didn't even wake up as we were leaving!