Vs unknown

Party, $0.10/$0.25 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $30.04 (120.2 bb)
BB: $3.13 (12.5 bb)
Hero (UTG): $25 (100 bb)
MP: $22.65 (90.6 bb)
CO: $27.37 (109.5 bb)
BTN: $10.25 (41 bb)

Preflop: Hero is UTG with As Js
Hero raises to $0.75, 3 folds, SB calls $0.65, BB calls $0.50

Flop: ($2.25) 5c Jd 2d (3 players)
SB checks, BB checks, Hero bets $1.25, SB raises to $2.50, BB folds, Hero calls $1.25

Turn: ($7.25) 5h (2 players)
SB bets $5.16, Hero??