Party Poker 2/4 Hold'em (8 handed) converter

Preflop: Hero is UTG with [Kd], [Qs].
Hero raises.

Flop: (5 SB) [Ah], [2h], [Qd] (2 players)
SB checks, Hero bets, SB calls.

Turn: (3.50 BB) [6h] (2 players)
SB checks, Hero bets, SB calls.

River: (5.50 BB) [9c] (2 players)
SB checks, Hero checks.

Final Pot: 5.50 BB

I've been in a lot of heads up situations with second pair, and I feel completely lost.
Should I check this turn? Bet the river?

read on SB would be nice

betting is all right unless he folds on the river a ridiculous amount

No reads