NL25 - AKo 3-bet PF UI flop

[yellowbluebus]

PokerStars 25 NL Hold'em <font color="#0000FF">(5 handed)</font> HandRecorder v0.9b (http://www.dmasn.com/handrecorder)

Stacks &amp; Stats
CO ($12.90)
SB ($14.60)
BB ($6.40)
MP ($62.90) (53/20/2.11/40) (40h)
Hero ($30.10)

Preflop: Hero is BU with A/images/graemlins/heart.gif, K/images/graemlins/diamond.gif
<font color="#FF0000">MP raises to $1</font>, <font color="#666666">1 folds</font>, <font color="#FF0000">Hero raises to $3.50</font>, <font color="#666666">2 folds</font>, MP calls $2.50.

Flop: ($7.35) 2/images/graemlins/diamond.gif, 9/images/graemlins/club.gif, J/images/graemlins/club.gif <font color="#0000FF">(2 players)</font>
<font color="#FF0000">MP bets $3.50</font>, Hero folds.

Final Pot: $10.85.

Standard?

[hoyasaxa]

I raise that donk bet all day

[yellowbluebus]

[ QUOTE ]
I raise that donk bet all day

[/ QUOTE ]

How much and why? If this wasn't a 3-bet PF pot I'd consider it.