Earlier in the session I played the following hand against villain:

Stacks:
UTG 1 ($17.10)
CO ($99.65)
SB ($33.17)
Hero ($50.00)

Pre-flop: ($0.75, 6 players) Hero is BB [5c]
1 fold, UTG 1 raises to $1, CO calls $1, 1 fold, SB calls $0.75, Hero calls $0.5

Flop: [5s][4d] ($4, 4 players)
SB checks, Hero bets $4, 2 folds, SB calls $4

Turn: ($12, 2 players)
SB checks, Hero bets $12.5, SB goes all-in $28.17, Hero calls $15.67

River: ($68.34, 2 players)

SB shows: [8d]

And now the actual hand:

$0.25/$0.5 No Limit Holdem
5 players
Converted at

Stacks:
UTG ($68.75)
CO ($51.90)
BTN ($80.60)
SB ($41.39)
Hero ($51.75)

Pre-flop: ($0.75, 5 players) Hero is BB [Th]
3 folds, SB calls $0.25, Hero checks

Flop: [7h][5d] ($1, 2 players)
SB checks, Hero bets $1, SB calls $1

Turn: ($3, 2 players)
SB checks, Hero bets $3, SB calls $3

River: ($9, 2 players)
SB checks, Hero bets $7, SB goes all-in $36.89, Hero???