Villan is an aggro 50/19

Party Poker No-Limit Hold'em, $ BB (6 max, 5 handed) FTR converter on zerodivide.cx

SB ($198.65)
BB ($275.80)
UTG ($200)
MP ($99.05)
Hero ($376.05)

Preflop: Hero is Button with A, K. SB posts a blind of $1.
2 folds, Hero raises to $6, SB (poster) calls $5, BB calls $4.

Flop: ($18) 3, 4, 4 (3 players)
SB checks, BB checks, Hero bets $10, SB folds, BB raises to $25, Hero calls $15.

Turn: ($68) J (2 players)
BB bets $35, Hero ...

your line? what do you put him on on the flop, turn?