BB, hold AKs. UTG is a sLPA, and SB is a Fish (plays like 70% of his hands). Should've I re-raised the pre-flop raise from UTG? Did I play this right?

PokerStars No-Limit Hold'em, $0.02 BB (7 handed) FTR converter on zerodivide.cx

MP2 ($4.93)
CO ($0.29)
Button ($3.82)
SB ($4.30)
Hero ($6.78)
UTG ($3.73)
MP1 ($8.59)

Preflop: Hero is BB with K, A.
UTG raises to $0.06, 4 folds, SB calls $0.05, Hero calls $0.04.

Flop: ($0.18) 6, 4, 8 (3 players)
SB checks, Hero checks, UTG bets $0.06, SB calls $0.06, Hero calls $0.06.

Turn: ($0.36) A (3 players)
SB checks, Hero bets $0.42, UTG folds, SB calls $0.42.

River: ($1.20) 3 (2 players)
SB checks, Hero bets $1.2, SB raises to $3.76, Hero calls $2.56.

Final Pot: $8.72