50nl: weird spot with 2 purrrrrrrr in limped pot.

[ReNoRyan]

I've never played with villian so I dont have any hands on him.

Whats my play here? What am I beating here?
Does he play a set like this? Comments on all streets appreciated also.

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 4 Players - (LegoPoker Hand History Converter)

SB: $63.20
Hero (BB): $50.05
UTG: $70.75
BTN: $25.85

Preflop: Hero is dealt J[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/spade.gif[/img] (4 Players)
UTG calls $0.50, BTN folds, SB calls $0.25, Hero checks

Flop: ($1.50) J[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/club.gif[/img] (3 Players)
<font color="red">SB bets $1.00</font>, <font color="red">Hero raises to $4.00</font>, UTG folds, <font color="red">SB raises to $11.50</font>, Hero calls $7.50

Turn: ($24.50) 2[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">SB bets all-in for $51.20</font>, Hero