50NL Q7s river bluff raise

[bet2win]

0.25/0.50blinds Pacific 5 handed

2 limpers I complete in the SB with Q7s BB checks

flop is QdAc4s checked around

turn 8c I make a weak 50c bet into the $2 pot 45/7.7/4 agroish guy UTG(not that many hands) raises to $2

Surely he doesnt have an ace here? I figure he is raising because I made a piss weak bet.

I call

river 9h he bets $5 into the $6 pot and I'm pretty sure he doesnt want me to call and he doesnt have an ace so I raise it to $10