TPTK facing heat in blind battle

[Pomtidom]

Effective stacks 100BB, 4-handed. Villain is SB (52/3.5/.54 over 50) I am in BB.

Everyone folds to SB who calls, I raise to 3 with A[img]/images/graemlins/club.gif[/img]J[img]/images/graemlins/diamond.gif[/img], SB calls.

Flop 8[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/spade.gif[/img] (Pot: $6):
SB checks, Hero bets 4.50, SB raises to 19.50, Hero calls.

Turn Q[img]/images/graemlins/heart.gif[/img] (Pot: $45):
SB bets 20.0, Hero calls.

River 5[img]/images/graemlins/spade.gif[/img] (Pot: $85):
SB goes all-in for 84.06, Hero folds.

Thoughts?