No rocket science, just wondering how to play this spot optimally.
Caller is a typical weekend fish, 3-bettor weak reg.
Flatting has its advantages to keep the fish in the pot. I'm afraid the 4-bet will look very nutted from this position and we don't have many bluffs.

Microgaming - €4 NL - Holdem - 9 players
Hand converted by PokerTracker 4

MP: 59.23 BB (VPIP: 42.86, PFR: 14.29, 3Bet Preflop: 0.00, Hands: 14)
MP+1: 30.48 BB (VPIP: 14.29, PFR: 14.29, 3Bet Preflop: 0.00, Hands: 14)
MP+2: 100 BB (VPIP: 28.93, PFR: 22.03, 3Bet Preflop: 7.09, Hands: 1,714)
CO: 100.65 BB (VPIP: 21.43, PFR: 14.29, 3Bet Preflop: 0.00, Hands: 14)
BTN: 119.13 BB (VPIP: 25.32, PFR: 17.09, 3Bet Preflop: 8.47, Hands: 162)
SB: 118.75 BB (VPIP: 25.97, PFR: 18.18, 3Bet Preflop: 0.00, Hands: 77)
BB: 103.78 BB (VPIP: 30.77, PFR: 20.51, 3Bet Preflop: 33.33, Hands: 40)
UTG: 103.5 BB (VPIP: 25.81, PFR: 19.35, 3Bet Preflop: 3.57, Hands: 63)
Hero (UTG+1): 100 BB

SB posts SB 0.5 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.5 BB) Hero has A A

fold, Hero raises to 3 BB, MP calls 3 BB, fold, fold, fold, BTN raises to 10 BB, fold, fold, Hero raises to 23.5 BB, fold, fold