10NL AKo 3bet and flop two-tone JK3

How would you bet this flop? UsBad was a solid player 15|8

$0.05/$0.1 No Limit Holdem
9 players
Converted at weaktight.com

Stacks:
UTG davidalan81 ($9.15)
UTG+1 plumcake ($5.45)
MP1 igguk ($14.55)
MP2 nigelnz ($6.95)
MP3 usBad ($11.30)
CO Hero ($15.80)
BTN Mooslos ($9.25)
SB Alorst ($7.75)
BB Kontrast101 ($10.70)

Pre-flop: ($0.15, 9 players) Hero is CO :as: :kh:
davidalan81 calls $0.10 ($9.05), 3 folds, usBad raises to $0.50 ($10.80), Hero raises to $1.60 ($14.20), 3 folds, davidalan81 folds ($9.05), usBad calls $1.10 ($9.70)

Flop: :jd: :3c: :kd: ($3.45, 2 players)
usBad checks ($9.70), Hero ($14.20)?

His range here is rather tight.. I'd bet $2.50 but it's somewhat tough if he decides to continue. You can also check and hope to extract some more value on later streets from weaker hands.

i would be $2.5 as well and call a shove.