NL5?10? Weak Ace, I think he's playing back at me

[vixticator]

UTG is 50/10/1 through 30 hands

The hand before this I 3-bet him PF and bet flop, he took a sec before folding and I think he thinks he laid down the best hand. His minraise here I thought could be a straight draw, higher Ace, Ten, or possibly middle pair of some kind. When he checks behind the turn I bet the river for value... too thin, good? Check/call?

Poker Stars - No Limit Hold'em Cash Game - $0.02/$0.05 Blinds - 4 Players - (LegoPoker HH Converter (http://www.legopoker.com/hh))

Hero (SB): $16.47
BB: $13.16
UTG: $7.53
BTN: $11.28

Preflop: Hero is dealt A/images/graemlins/club.gif 7/images/graemlins/club.gif (4 Players)
UTG calls $0.05, BTN folds, <font color="red">Hero raises to $0.20</font>, BB folds, UTG calls $0.15

Flop: ($0.45) T/images/graemlins/diamond.gif 8/images/graemlins/club.gif A/images/graemlins/heart.gif (2 Players)
<font color="red">Hero bets $0.32</font>, <font color="red">UTG raises to $0.64</font>, Hero calls $0.32

Turn: ($1.73) 3/images/graemlins/club.gif (2 Players)
Hero checks, UTG checks

River: ($1.73) K/images/graemlins/heart.gif (2 Players)
<font color="red">Hero bets $0.75</font>

[Ikaika]

I'd c/c a reasonable river bet. Leading that weak is just begging to get raised, to which you have to fold.