Prima, $0.25/$0.50 No Limit Hold'em Cash, 6 Players
BB: $38.25 (76.5 bb)
UTG: $37.42 (74.8 bb)
MP: $52.33 (104.7 bb)
Hero (CO): $59.26 (118.5 bb)
BTN: $60.69 (121.4 bb)
SB: $68.04 (136.1 bb)
Preflop: Hero is CO with K
K
2 folds, Hero raises to $1.50, BTN folds, SB raises to $5.50, BB calls $5, Hero raises to $18.50, SB calls $13, BB calls $13
Flop: ($55.50) Q
9 2 (3 players)
SB bets $49.54, BB calls $19.75 and is all-in, Hero ???
Anon table.
SB 25/18 after 110 hands, 4.5 3bet
BB 15/11 on small sample
Another, sweet, pleasant situation... 
Fold flop?