Pussy or prudent? KK facing A on board

[cheburashka]

Relatively early in 4/180

Not a lot of comment, as hand is pretty self-explanatory. Villain arrived only two hands ago--1 fold and 1 raise (collecting without showing cards).

UTG: (485 in chips)
UTG+1: (3026 in chips)
MP1: (2035 in chips)
MP2: (2040 in chips)
HJ: (1738 in chips)
CO: (5085 in chips)
Hero: (2570 in chips)
SB: (1322 in chips)
BB: (1395 in chips)

Blinds 15/30, Hero on button with K [img]/images/graemlins/diamond.gif[/img] K [img]/images/graemlins/spade.gif[/img]

One fold, MP1 raises to 90, four folds, Hero raises to 270, two folds, MP1 calls 180

Flop: (585) [2 [img]/images/graemlins/club.gif[/img] A [img]/images/graemlins/club.gif[/img] T [img]/images/graemlins/spade.gif[/img]]

MP1 checks, Hero bets 400, MP1 raises to 800, Hero???