I openraise 10 (standard raise is 8 - 15) with JJ from MP. CO and BTN calls.
CO is a donkey and BTN is a regular 5-10 6max online player and 10-20 hu specialist, we are friends and we know each other well. We are all deep.

Flop is 862 rainbow, i check, CO bet 30, BTN call and i raise 120. Both call.
Turn Q, all check.
River Q, i check, CO bets 140, BTN calls, i tanked a little and then call.

I think that they can't have a set since they flatcalled flop and then check turn. Q improved my hand since i beat 86 and other 2p on the river.
So it's probably a standard call.

Anyway, after the checkline, i really ask myself what should i do if BTN shove river. I think that CO usually have a busted draw or something i beat, and i think that BTN know this and value call him but he should know i always beat the 8 since i never checkraise that flop 3way with a bluff.
We talked about the hand later and i said he should have folded or shoved, calling is bad since i always call there but i really don't know what should i do if he shoves. My hand is equal to AA there since anyone have QQ KK AA for sure. If i fold JJ i also fold Aces in that spot.
What should i do if he shove river? Anyway, with that action, is it a standard call?

bump

flop is awful given stacks.

i would just bet the flop and go from there.