25nl 6-Max: Top & Bottom Pair Facing Flop c/r

Flop:Does anybody find a fold here? The c/r is pretty ugly as I doubt the typical 25nl post-flop nit doesn't have me beat (3 combos of 66 and 2 combos of A6s), but I call to assess the turn plus I have the backdoor nut fd.

Turn:As played, would you find a fold here? Or even consider a semi-bluff jam? Villain doesn't quite give me pot odds to chase the nut flush and I'd expect most villains to c/f even if I do hit, meaning I doubt I have the implied odds to call.

River:What's the plan for non-spade rivers facing a bet? Easy fold?

Only had about 40 hands on villain at the time, playing around 17/10, folded 1/1 to cbet. Didn't seem particularly imaginative or aggressive.

Hero (Button) ($32.40)
SB ($33.07)
BB ($38.69)
UTG ($25)
MP ($29.74)
CO ($11.98)

Preflop: Hero is Button with A, 3
3 folds, Hero bets $0.75, SB calls $0.65, 1 fold

Flop: ($1.75) 6, A, 3 (2 players)
SB checks, Hero bets $1.25, SB raises $3.25, Hero calls $2

Turn: ($8.25) 8 (2 players)
SB bets $5.50, Hero?????

given positions id prolly have to 3b this flop and prolly call now and prolly fold if we face barrel number 3, as i dont expect villain to ever vbet worse on the river and i doubt he is ever airball bluffing.
i would fold this turn w/o As

After only 40 hands, there is almost no read that will get me to fold aces-up OTF. This is probably a 3-bet spot, to encourage Villain to bear in mind that BTN v Blind battles are not just easy steals for him.

Folding Aces up w/ NFD has got to be a bad play almost every time, too. IF Hero is behind OTT, there are 13 outs to complete to a better hand than Villain (well, probably 11 outs, as Villain seems to have a strong piece of this board, but it could be 66). I can easily jam OTT.

3b flop, you get value from a lot of AK,AQ,AJ as he can easily put you on a flush draw or nut flush draw when you b/3b

as played it looks to me that raising the turn folds most worse hands and all better hands continue. Call, and pretty much call any river except maybe a non-spade K. If he checks river, probably check behind (not sure as you may still get some value from an A if you bet small).

For your range, yes 66 and 33 are there, but I doubt A6s. Lots of aces+good kicker though.

I know it's only 40 hands, but your image (esp. ATS) and his fold to steal numbers are relevant.

if i were hero i'd be calling turn and folding to any serious action on non-spade/3/A rivers. can't see villain going for three streets w/just a top a pair good kicker type hand on most rivers. but i can still see him having AQ and maybe AK if he doesn't 3b it pre at this point in the hand

I'd like to take back what I said in my previous post: if he bets the river after you call the turn it's most likely a fold.

Interested in what people think we should do when he checks a non spade/3 river to us though.