Gross overbets

Posted this hand on 2+2. I know that the gross overbet is almost always a very strong hand. But maybe he can have a weaker two pair or a chopping AK? On the other hand, maybe he thinks I can have AK because I'm tight and I raised preflop, so therefore he will never make this move with anything that doesn't beat AK.

$0.25/$0.5 No Limit Holdem
8 players
Converted at weaktight.com


Stacks:

UTG		($65.80)
UTG+1		($11.85)
MP1		($55.00)
Hero		($54.00)
CO		($46.15)
BTN		($63.85)
SB		($59.25)
BB		($27.50)

Pre-flop: ($0.75, 8 players) Hero is MP2

3 folds, Hero raises to $2, 2 folds, SB calls $1.75, 1 fold

Flop: ($4.5, 2 players)
SB checks, Hero checks

Turn: ($4.5, 2 players)
SB bets $3.5, Hero calls $3.5

River: ($11.5, 2 players)
SB goes all-in $53.75, Hero goes all-in $48.5
SB shows:

SB wins $105.5 ( won +$46.25 )
Hero lost -$54.00