20plo - line check

20 plo - 6 handed no straddle - club wpt gold

Eff 100bb

H in CO limps T♣8♣6♦T♥
Btn(37/22) pots
SB(40/12) calls
BB calls

4way pot 26bb
Flop 9♥7♣5♥
H donks 20bb
SB calls

HU pot 66bb
Turn 9♦
H has like 80bb left
H bets 18bb, we supposed bet? or check back? or bigger sizing?
SB jams
H folds