25NL AJ hit trips, get out/happy?

[chanchuan]

Villain is 50/20ish over a very small smaple, but I didn't respect his pf raise much, he's been raising very often recently. However, after he calls my flop raise and leads the turn I start to wonder - what hands do that which I beat...

Full Tilt Poker - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $28.60
BB: $42.95
UTG: $42.80
MP: $31.15
CO: $21.45
<font color="black">Hero (BTN): $25.00</font>

<font color="black">Preflop:</font> Hero is dealt J[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/diamond.gif[/img] (6 Players)
UTG folds, <font color="red">MP raises to $0.75</font>, CO folds, <font color="red">Hero raises to $3.00</font>, 2 folds, MP calls $2.25

<font color="black">Flop:</font> ($6.35) 8[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">MP bets $2.50</font>, <font color="red">Hero raises to $7.00</font>, MP calls $4.50

<font color="black">Turn:</font> ($20.35) 5[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">MP bets $9.00</font>, Hero...

I don't put him on the flush here, however his weak flop bet might look like the fd, or just a cbet into a board he's scared of. What about my flop line? On the turn it seems like a marginal spot to me. I believe he could be doing that whit any ace, of which AK, AQ, A8 and A5 beat me (and 88 of course), or is it too much a liberal assumption? Thoughts?