min raiser is loose-passive, SB and I are solid slags.

Ultimate Bet
No Limit Holdem Ring game
Blinds: $0.50./$1.
5 players
Converter

Stack sizes:
UTG: $79.95
CO: $70.05
Button: $103.10
SB: $98.50
Hero: $158.55

Pre-flop: (5 players) Hero is BB with 4 T
UTG calls, CO calls, Button calls, SB calls, Hero checks.

Flop: J 8 9 ($5, 5 players)
SB checks, Hero bets $4, UTG calls, CO folds, Button raises to $8, SB raises to $20, Hero???

What's the best move/plan here?