Good fold? TPTK 3-way Pot

[jawe]

Full Tilt Poker - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker Hand History Converter)

SB: $53.60
Hero (BB): $50.00
UTG: $28.40
MP: $25.00
CO: $62.65
BTN: $49.25

Preflop: Hero is dealt A[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img] (6 Players)
UTG folds, MP calls $0.50, 2 folds, SB calls $0.25, <font color="red">Hero raises to $2.00</font>, MP calls $1.50, SB calls $1.50

Flop: ($6) 8[img]/images/graemlins/club.gif[/img] T[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] (3 Players)
SB checks, <font color="red">Hero bets $4.00</font>, <font color="red">MP raises to $8.00</font>, SB calls $8.00, Hero calls $4.00

Turn: ($30) 2[img]/images/graemlins/spade.gif[/img] (3 Players)
SB checks, Hero checks, <font color="red">MP bets all-in for $15.00</font>, SB calls $15.00, Hero folds

River: ($60) 6[img]/images/graemlins/diamond.gif[/img] (2 Players - 1 All-In)

Pot Size: $60.00 ($3 Rake)

MP is 44/13/12. He overplays Toppair with weak kicker, so I wasn't so worried about his play.

SB is new, but I saw him limp calling oop with AK some hands before.

Was this fold to weak?

Should I raised the flop?