nl50 , folding AKo vs 3bet PF?

[Frawa]

MP - idiot who ran like 60/40 super aggro , stacked off against me few hands ago

SB - regular prolly 20/16, doing ok

Poker Stars, $0.25/$0.50 NL Hold'em Cash Game, 6 Players
LeggoPoker Hand History Converter

Hero (BB): $121.50
UTG: $63.90
MP: $21.20
CO: $52.30
BTN: $21.50
SB: $60.90

Pre-Flop: A[img]/images/graemlins/club.gif[/img] K[img]/images/graemlins/spade.gif[/img] dealt to Hero (BB)
UTG folds, <font color="red">MP raises to $2.50</font>, 2 folds, <font color="red">SB raises to $8</font>, Hero?

i knew most of the times MP would stick his stack in , so this was push or fold to me , since calling 20$ missing flop and folding is meh

is there a fold ok? good ? bad?

MP will play any 2 here imo
SB knows this and will 3bet acordilgly to isolate him
so my problem is SBs range

if i 4bet/shove , MP will call 99% of the time , and SB gets pretty nice odds so i think he is priced to call even with the bottom end of his range