10/20 Graveyard game @ Borg A6s

[sem25]

I haven't played LHE, or live poker in general, for awhile. Comments on all streets appreciated. Thanks.

Game was pretty good for a Sunday night/Monday morning. Right as I sat down, the whole table (9 ppl) went to a flop w/one raise PF. Indicator of juicy things to come. I probably played three or so hands in about 5 or so orbits, mostly unsuccessful steal raises against some calling stations.

Villain 1 also recently sat down at the table. No real reads, he won a hand w/AA (on waitlist for awhile so he was really eager to play when he finally got called).
Villain 2 also recently sat down for one orbit. He came in from a 2/5 table.

Here's the hand:
I limped PF UTG w/A6s (clubs). I know that's kinda spewy, but I don't mind playing for 2bets w/it. Villain 2 is UTG+2 raises, a LP cold calls in the CO and BB (Villain 1) completes.

FLOP: 458 (2 clubs) POT SIZE: 8.5 small bets
Villain 1 leads out. I called, pretty sure that Villain 2 was going to raise the bet, since being the PF aggressor and was going to decide after seeing all the action whether to call/raise. CO cold calls again, and Villain 1 only calls, and I hesitate, but only call.

TURN: A, board of A458 (2 diamonds, 2 clubs) PS: 8.25 BB
Villain 1 at this point leads out again. I wanted to raise again, but wussed out because I didn't want to eliminate the rest of the field and possibly face a 3-bet from a two pair type hand. Villain 2 pauses and calls, and CO calls again.

My main question is should I have raised somewhere there? Either flop or turn?