4/8 kill hand against loose-passive and new guy

[Yads]

live 4/8 kill game, kill is on
2 villians:
MP1, old guy who only raises when he has a lock or near a lock, will bet top pair if checked to, otherwise calls down, has just posted the kill blind
SB who just recently sat down with a buddy, no real reads on him yet

Hero is UTG+1 with AsJh
1 fold, hero raises, MP1 calls, SB calls, BB calls

flop: Ad 8d 9h (8 SB)
checked to hero who bets, MP1 calls and SB calls

turn: 4d (5.5 BB)
checked to hero who bets, MP1 calls, SB raises, Hero?

What's your play here?