25NL - AA on monotone flop

[Micro Donk]

my main question is i have to keep betting to protect, right?

villain is a solid reg, 18/15/2.8 over a few hundred. weve 3bet each other a couple times, but none have gone too far

and i was going to leave the table but then it refilled, so no table selection stuff lol...

and i likely should have made the flop at least 6

Poker Stars, $0.10/$0.25 NL Hold'em Cash Game, 3 Players
LeggoPoker.com - Hand History Converter

Hero (SB): $28.95
BB: $10.15
BTN: $53.35

Pre-Flop: A[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img] dealt to Hero (SB)
<font color="red">BTN raises to $1</font>, <font color="red">Hero raises to $3.50</font>, BB folds, BTN calls $2.50

Flop: ($7.25) 5[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $5</font>, BTN calls $5

Turn: ($17.25) 6[img]/images/graemlins/diamond.gif[/img] (2 Players)
Hero...