Overplaying?

Just as a note, I did win this hand, and overall I think this has been a +EV play for me, but I'm not sure that it will be +EV in the longterm which is why I'm posting this. I want to know if you guys think I'm too agressive postflop with this hand, as I will normally play my mid-high pocket pairs like this with one overcard on the board, more or less agressive depending on how tight/loose my opponents are. In this case I was new to the table
and didn't have a good read yet on anyone.

PokerStars Game #4422021107: Hold'em No Limit ($0.01/$0.02) - 2006/03/26 - 16:09:34 (ET)
Table 'Ate' 9-max Seat #1 is the button
Seat 1: ElHinkey ($6.70 in chips)
Seat 2: Tekadi ($3.06 in chips)
Seat 3: teamtriangle ($4.44 in chips)
Seat 4: pitch62 ($4.92 in chips)
Seat 5: kinkymoney ($1.70 in chips)
Seat 6: patsfan226 ($5.57 in chips)
Seat 8: azureXsmurF ($5.20 in chips)
Seat 9: ToTMidiaN ($5.93 in chips)
Tekadi: posts small blind $0.01
teamtriangle: posts big blind $0.02
*** HOLE CARDS ***
Dealt to azureXsmurF [Js Jd]
pitch62: calls $0.02
kinkymoney: folds
azureXsmurF said, "had aces"
azureXsmurF said, "T_T"
patsfan226: calls $0.02
azureXsmurF: raises $0.10 to $0.12
azureXsmurF said, "nh"
ToTMidiaN: calls $0.12
ElHinkey: folds
Tekadi: calls $0.11
teamtriangle: folds
pitch62: folds
patsfan226: folds
*** FLOP *** [Qh 5s 8h]
Tekadi: checks
azureXsmurF: bets $0.18
ToTMidiaN: calls $0.18
Tekadi: calls $0.18
*** TURN *** [Qh 5s 8h] [3d]
Tekadi: checks
azureXsmurF: bets $0.20
ToTMidiaN: calls $0.20
Tekadi: calls $0.20
*** RIVER *** [Qh 5s 8h 3d] [8d]
Tekadi: checks
azureXsmurF: bets $0.20 <---= meant to be a blocking bet
ToTMidiaN: calls $0.20
Tekadi: folds

Pot is .42 and you're betting .18 on the flop, less than 1/2. Turn, pot is now .96 and you're betting .20, less than 1/4. At what point do your opponents NOT have odds to call?

I dont think this is really a question of overplaying the hand, because your bets were small the entire way through as Warpe pointed out. Preflop is fine, flop and turn Id bet more, on the river Im not all that sure. If you are going to bet, bet more, but I dont think a check is horrible there; however, the river is by far the street where I am the most unsure of the correct play, for take my advice with a grain of salt

With 4 calling stations in on the flop, all real loosies, its too likely that one of them hit the Q in some way. Betting the flop is fine, the rest of the bets I wouldn't make though.