One outer

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) from (Format: FlopTurnRiver)

MP1 ($3.75)
MP2 ($10)
MP3 ($12.75)
CO ($1.75)
Button ($7.90)
Hero ($9.70)
BB ($11.35)
UTG ($4.95)
UTG+1 ($11.50)

Preflop: Hero is SB with T, 6.
1 fold, UTG+1 calls $0.10, 4 folds, Button calls $0.10, Hero completes, BB checks.

Flop: ($0.40) 2, Q, 3 (4 players)
Hero bets $0.4, BB raises to $11.25, UTG+1 folds, Button calls $7.80 (All-In), Hero calls $9.20 (All-In).

Turn: ($29.05) A (3 players, 2 all-in)

River: ($29.05) 3 (3 players, 2 all-in)

Final Pot: $29.05

Results in white below:
Hero has Td 6d (flush, ace high).
BB has 5d 4d (straight flush, five high).
Button has 9d Jd (flush, ace high).
Outcome: BB wins $29.05.

Yep. Every time. Losing flush to flush is rare (not to mention he also wouldn't push on this flop with it), and he will improve less than 20% by river since you have some of the outs already. And he might even be drawing to a lower flush.

WOW. That is incredibly rare for all three to flop the flush.

Call every time.

Come to think of it, thats the first time I've got someone to pull a one outer

I didn't even see there was a 3rd person in the hand. You already were losing to the J-high flush.

I don't complete that hand in the SB there. Other than that, standard.