Small flush HU

We have been playing HU for about half an hour now, i've been playing super LAG although just recently slowed down, I dont think villan noticed. He makes a lot of mini raises on all streets with garbage, and usually follows it by a 4xBB raise on the river, ive come over the top a couple times on him and he folds every time. He also has a tell that if he pauses before a check or bet he almost always has a strong hand. Anyway here it is.

Hero: $185
Villan: $150

Hero: 5 [img]/images/graemlins/club.gif[/img]6 [img]/images/graemlins/club.gif[/img]
Im on the button and call, villan raises to $3, hero calls.
Flop: K [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/club.gif[/img]7 [img]/images/graemlins/club.gif[/img]
Villan bets $1, Hero raises to $3, Villan calls. At this point im putting him on a pair here, he usually bets his draws pretty strong.
Turn: J [img]/images/graemlins/club.gif[/img]
Villan bets $1, Hero raises to $15, Villan calls.
FlopL 10 [img]/images/graemlins/heart.gif[/img]
Villan bets $40 (no pause), Hero?
Is everybody just calling here or anybody raising him? Im thinking the nut straight is very possible but, im a bit worried about what he is calling with on the flop and turn. AKo is also a possibility although i think he would play it harder then that. Comments on all streets appreciated.