pll: season 4

FINALLY I’VE GOT IT. It has always been odd to me how CeCe said in the season 4 finale that who killed Bethany was ‘the one who who still want to hurt’ Ali. 

But I just realized that in the same episode (or the next. I don’t remember exactly) MONA is creating an army against Ali before she comes back to Rosewood. 

CeCe knows Mona killed Bethany, and maybe that’s why Mona help her at the beginning… and maybe that’s what got CeCe killed.