109 hands with Villain. Hasn't gotten out of line, but his 3b is 6.5%.

Should the re-raise on the turn be a bit larger. I'm assuming so. ~$13? ....$16 would leave me with about a psb on river.

Wouldn't 88-77 raise on this coordinated flop in good position?

Poker Stars $0.25/$0.50 No Limit Hold'em - 9 players - View hand 617892
The Official DeucesCracked.com Hand History Converter

UTG+1: $59.80
UTG+2: $9.25
MP1: $60.55
MP2: $54.55
Hero (CO): $55.60
BTN: $71.40
SB: $51.70
BB: $10.00
UTG: $36.95

Pre Flop: ($0.75) Hero is CO with A 3
1 fold, UTG+1 raises to $1.50, UTG+2 calls $1.50, MP1 calls $1.50, 1 fold, Hero calls $1.50, 3 folds

Flop: ($6.75) 8 A 7 (4 players)
UTG+1 checks, UTG+2 checks, MP1 checks, Hero checks

Turn: ($6.75) A (4 players)
UTG+1 checks, UTG+2 checks, MP1 bets $4, Hero raises to $10, UTG+1 folds, UTG+2 folds, MP1 calls $6

River: ($26.75) K (2 players)
MP1 bets $12, Hero calls $12