PokerStars No-Limit Hold'em, $0.25 BB (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

UTG ($14)
MP1 ($23.30)
MP2 ($5.50)
CO ($45.55)
Hero ($23.45)
SB ($35.75)
BB ($19)

Preflop: Hero is Button with 8, 8.
3 folds, CO calls $0.25, Hero calls $0.25, SB completes, BB checks.

Flop: ($1) 6, 8, T (4 players)
SB bets $1, BB raises to $2.5, CO folds, Hero ???

Both villains were very aggressive post flop, but I think I cannot given them a free card and this flop by calling their bets only. Therefore, I think a raise to about $6 is better, no?