Party 6 max $25 NL

Villain only been at table 33 hands, stats 29/0/0.5, likes to limp pre, has called pf raises with sc's/KJo type hands and is generally a calling station post flop if he has any piece of the board.

Villain 2 32/21/2 over 54 hands no real reads, tends to play from position so suspect he isn't a total donk.

Hero 31/22/4.5 for this session over 300 ish hands. Raising a lot pf from btn/co but not been caught out of line going to showdown.

What is Hero's line on flop after BB bet and villain call and why?

Party Poker No-Limit Hold'em, $0.25 BB (6 handed) - Party-Poker Converter Tool from FlopTurnRiver.com

Hero (Button) ($49.58)
Villain (SB) ($21.43)
Villain 2 (BB) ($15.19)
UTG ($3.27)
MP ($26.04)
CO ($25)

Preflop: Hero is Button with A, A
Villain 2 calls $0.25, 1 fold, Villain calls $0.25, Hero raises $1.25, 2 folds, Villain 2 calls $1, Villain calls $1

Flop: ($4.10) 3, 7, A (3 players)
Villain 2 bets $1.75, Villain calls $1.75, [color=#CC3333]Hero ??