What should I do on the turn? Without the ace I would fold, as it is I am unsure

Party Poker
No Limit Holdem Ring game
Blinds: $0.05/$0.10
9 players
Converter

Stack sizes:
UTG: $1.95
UTG+1: $10.99
MP1: $9.34
MP2: $2.08
Hero: $12.28
CO: $9.85
Button: $1.59
SB: $12.54
BB: $10.55

Pre-flop: (9 players) Hero is MP3 with A 7
UTG folds, UTG+1 calls, MP1 calls, MP2 folds, Hero calls, 2 folds, SB calls, BB checks.

Flop: 6 Q K ($0.5, 5 players)
SB checks, BB checks, UTG+1 bets $0.4, MP1 folds, Hero calls, 2 folds.

Turn: A ($1.3, 2 players)
UTG+1 bets $1.8, Hero ???