Tripple facing shove [25NL]

[Afro_Love]

PokerStars No-Limit Hold'em, $0.25 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($49.70)
MP ($9.75)
CO ($15.55)
Button ($25.60)
SB ($18.85)
Hero ($22.65)

Preflop: Hero is BB with A[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, MP calls $0.25, CO calls $0.25, <font color="#666666">1 fold</font>, <font color="#CC3333">SB raises to $1</font>, Hero calls $0.75, MP folds, CO calls $0.75.

Flop: ($3.25) 6[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets $2.5</font>, Hero calls $2.50, CO folds.

Turn: ($8.25) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $5</font>, SB calls $5.

River: ($18.25) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $10.35 (All-In)</font>, Hero ???

Final Pot: $38.95

Is this a call or a fold? I'm leaning to either a boat or a bluff. Why would a flush draw call the turn bet? Or is it profitable to call that turn bet with a draw?