50 nl, line check

[cooker3]

Villain is really aggro pf but very passive post flop, he is a big donk though and will call with pretty much any pair and if he spots weakness then he is no issues going for it.

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 6 Players - (LegoPoker HH Converter)

hero (SB): $74.80
BB: $19.50
UTG: $16.45
MP: $13.65
CO: $53.10
BTN: $85.50

Preflop: hero is dealt K A[img]/images/graemlins/heart.gif[/img] (6 Players)
2 folds, <font color="red">CO raises to $2.00</font>, BTN folds, <font color="red">hero raises to $10.00</font>, BB folds, CO calls $8.00

Flop: ($20.50) 7[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/spade.gif[/img] 5[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">hero bets $14.50</font>

Pot Size: $35.00

The problem with the bet is it is unlikely he folds anything I beat, I have a pair zomg call etc yet if I check he could well bet without the goods and I really can't call as he could easily bet out decent hand so what is the best play after the flop?