re: Poker & KK in a heads up situation
When a player bets and you raise you should do it in increments of his bet, not the big blind.
If you had made it 4x70=280, you may have gotten a fold here. Maybe not.
Either way I like your call on the flop. The chances of him having flopped a set are slim. Also, with the flush draw on the board he was much more likely to have a piece of that as opposed to anything that beats your KK. He also could have had a queen with a marginal kicker.
Most players who have you beat in that situation would value bet as opposed to moving in, I would have put him on a high flush draw, and called.
A case can be made for moving it all in as a reraise preflop, although I would not have. I like to have a chance to get away from AA before the flop and AK after an A comes on the flop. Raising 3-4 times his raise may get you additional information about his hand. Still, a good case can be made for either play.
Other than pricing him in before the flop, you played ok.