Two BT headphones on a B50 with HDMI ARC

Hi
My TV has a HDIM ARC and I am interested to buy a B50.
My question is : Will I be able to use my BT headphones while my wife will listen to the TV trough the hifi speakers?
Will we be able to connect two BT headphones to listen the same movie or toisten to different audio sources?
Thanks for advices.