When to be scared with potential poison flop?

I hit set, maybe someone flops a flush. Suddenly someone shows strength, do I call?

Poker Stars
No Limit Holdem Ring game
Blinds: $0.10/$0.25
6 players
Converter

Pre-flop: (6 players) Hero is SB with :8c :8s
UTG calls, UTG+1 folds, CO calls, Button folds, Hero raises to $1, BB folds, UTG calls, CO calls.

Flop: :6h :2h :8h ($3.25, 3 players)
Hero bets $1, UTG calls, CO calls.

Turn: :td ($6.25, 3 players)
Hero bets $3, UTG calls, CO raises all-in $11.2, Hero ??

What is UTG's stack size?

I shove here and don't blink an eye (but maybe curse some words) if short stacked CO flopped a flush and the board doesn't pair.

Also, I would most likely complete with 88 out of the sb, but if you're going to raise, I'd make it around $1.5 with 2 limpers.

UTG is $13 and I was $33 before flop.

I called the all in and won. Villan had 1010

I don't get why you open push. Seems the only thing calling is a flush, and if they don't have a flush, you missed the value when they fold. Play is not very tricky at these stakes.