wtf cold call 3bet then raise flop...is this pretty much always a set?

PokerStars No-Limit Hold'em, $0.10 BB (8 handed) - Poker-Stars Converter Tool from FlopTurnRiver.com

BB ($16.20)
UTG ($10.90)
UTG+1 ($22.55)
MP1 ($1.35)
Hero (MP2) ($10.35)
CO ($9.85)
Button ($10)
SB ($15.15)

Preflop: Hero is MP2 with A, A
2 folds, MP1 bets $0.30, Hero raises to $0.90, CO calls $0.90, 3 folds, MP1 calls $0.60

Flop: ($2.85) 4, 10, Q (3 players)
MP1 checks, Hero bets $1.60, CO raises to $3.60, 1 fold, Hero?