CO likes to tango with me and thinks I'm FOS a lot.. 15/11/3

Button is decent 17/11/1.4 over 1.5k hands, pretty standard

Would a jack/44 raise the flop so hard?

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

MP3 ($61.50)
CO ($120.10)
Button ($180.95)
SB ($20.50)
BB ($110.45)
Hero (UTG) ($101.50)
UTG+1 ($48.50)
MP1 ($120)
MP2 ($101.50)

Preflop: Hero is UTG with K, K
Hero bets $4, 4 folds, CO calls $4, Button calls $4, 2 folds

Flop: ($13.50) J, J, 4 (3 players)
Hero bets $7, CO raises to $15, Button raises to $44, Hero?