Get it in, r/f or flat call turn? What's the river plan if we flat or raise and get called?

Villain is 20/14 with no 3bets over ~40 hand sample. This is 2nd time villain has donked flop from 4 opportunities but otherwise fairly passive post-flop.


PokerStars No-Limit Hold'em, $0.25 BB (5 handed) - PokerStars Converter Tool from http://www.flopturnriver.com

SB ($27.92)
BB ($21.03)
UTG ($24.50)
MP ($28.48)
Hero (Button) ($31.53)

Preflop: Hero is Button with A, 8
2 folds, Hero bets $0.62, 1 fold, BB calls $0.37

Flop: ($1.34) 7, 2, A (2 players)
BB bets $1, Hero calls $1

Turn: ($3.34) 8 (2 players)BB bets $1.50