Party Poker No-Limit Hold'em, $ BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

Hero ($27.20)
SB ($39.90)
BB ($35.45)
UTG ($9.40)
MP ($73.33)

Preflop: Hero is Button with A, A. SB posts a blind of $0.10.
1 fold, MP calls $0.25, Hero raises to $1.25, 2 folds, MP calls $1.

Flop: ($2.85) A, 6, 2 (2 players)
MP checks, Hero bets $1.6, MP calls $1.60.

Turn: ($6.05) Q (2 players)
MP checks, Hero bets $4, MP calls $4.

River: ($14.05) 4 (2 players)
MP bets $5, Hero calls $5.

Final Pot: $24.05

45/10 I assumed he hit his flush so I just called. What's standard here? How about if he bets bigger, like $11?