NL100 - 64s in BB, strange action - push 15-outer on multiway flop?

[erazorXP]

The title says it all, was this spew or the right play? i was a bit unsure how to handle this situation.

Stats on Villains:
SB looks TAGgy (30 hands only)
no real reads on MP1, but he played 6 of 9 hands
same goes for BU.
I assume they´re complete donks.

PokerStars No-Limit Hold'em, $1.00 BB (8 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">Button ($19.80)</font>
SB ($106.60)
<font color="#C00000">Hero ($103)</font>
UTG ($92)
UTG+1 ($118.55)
<font color="#C00000">MP1 ($65.65)</font>
MP2 ($103.30)
CO ($94.50)

Preflop: Hero is BB with 6[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, MP1 calls $1, <font color="#666666">2 folds</font>, Button calls $1, SB completes, Hero checks.

Flop: ($4) K[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/spade.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets $2</font>, Hero calls $2, <font color="#CC3333">MP1 raises to $4</font>, <font color="#CC3333">Button raises to $6</font>, SB calls $4, <font color="#CC3333">Hero raises to $102</font>, MP1 calls $60.65 (All-In), Button calls $12.80 (All-In), SB folds.

Turn: ($158.10) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players, 2 all-in)</font>

River: ($158.10) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players, 2 all-in)</font>

Final Pot: $158.10