$1 $3 Live Hero Has Set Facing River Jam After Flush Completes

Reads: H has been card dead so probably looks tight. Usually a pretty loose player but wouldn’t look like it here

V: been calling a lot of $15 raises preflop with junk. Have yet to see him bluff and has been betting big when he has it

Effective stacks: ~$200
Hero is in the LJ with 4♠ 4♣, opens to $15. Only SB and BB call.

Flop ($45): [4♦ 8♥ 9♥]
SB checks, BB checks, Hero bets $20, SB calls, BB folds.

Turn ($85): [A♣]
SB checks, Hero bets $40, SB calls.

River ($165): [K♥] — frontdoor flush gets there
SB snap jams for $137.
Hero tanks, asks him to show a card, and SB flashes the 7♥.

Hero?