FR NL25 kk in 3bet pot oop

What's your general plan on this type of spots?
I don't have a lot of hands to put him on a specific 3bet calling range, but this are the stats that i'm using:

Poker Stars, $0.10/$0.25 No Limit Hold'em Cash, 8 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

SB: $30.37 (121.5 bb)
Hero (BB): $27.13 (108.5 bb)
UTG+2: $14.07 (56.3 bb)
MP1: $26.59 (106.4 bb)
MP2: $25.46 (101.8 bb)
MP3: $33.07 (132.3 bb)
CO: $36.65 (146.6 bb)
BTN: $32.76 (131 bb)

Preflop: Hero is BB with K K
4 folds, CO raises to $0.63, 2 folds, Hero raises to $2, CO calls $1.37

Flop: ($4.10) A J 7 (2 players)
Hero checks, CO bets $2.50, Hero calls $2.50

Turn: ($9.10) T (2 players)
Hero checks, CO bets $5.21, Hero folds

Results:

Thanks!