AKo

[w_alloy]

I think SB is the main concern here, not the button. The button could easily be making a freeroll bet with an ace (especially because the fishy SB), and I think his range is pretty close to his 3 betting range, with maybe the aces discounted like 1/3-1/2.

I hate to give these types of answers, but I think it depends on how much and in what way SB is a fish. If he is less fishy then like 70+vpip and 55+wtsd (6max stats)I would fold call. Remember he called 3 cold (albeit from the sb) preflop so he could easily have a pp over 66.

You could easily be looking at a 3 way split, and it is very unlikely you will win the whole pot. Thusly, your pot odds are closer to 4 to 1 then 11 to 1.