dont know why replayer doesnt show, but blinds were 300/600 ante 60

both villains are regs, first was 2,5xing as a standard and  is 26/22/13 , btn 3bettor is 28/17/8.

im not shure  how should i proceed here , its kind of an obvious cold4 bet spot because initial raiser was opening alot and the 3bettor is on the btn so he could be light a ton. when he just clicks on me instead of shoving, looks quite scary imo cause he would get a ridiculous price to call of my shove. that being said, i could be really exploited by 4bet-folding AQ 45bbs deep ?

appreciate any comments 

thanks