USAF to Purchase Marines’ Vertical-Lift Fighter
http://www.jinsa.org/articles/articl...0,656,164,2407

Note the lift fan on the F-35B where the F-35A refueling-boom socket goes.

http://globalsecurity.org/military/s...craft/f-35.htm

So you need a KC-135R or KC-767 to refuel a F-35B, and the KC-767 can
only refuel one of these short ranged fighters at a time and only from a
safe distance to keep the airliner out of harm's way.

Perhaps USMC KC-130Js will go back to fill up from the AF KC-767s then
forwards to refuel AF F-35Bs? ;-)

-HJC