Interesting River Card

[Poker Punk 9]

I had recently sat down at the table so I had no real reads on anyone. I made a standard raise in the cut off with J9s. When the guy bet out on the flop I was fairly sure he was weak and I thought I could raise and steal the pot from him so I raised. On, the turn when he bet I wasn't sure what to do. I thought he may have had a flush but I wasn't sure. I thought I couldn't fold though since I was getting such good pot odds. On the river I hit my gin card. On the river though, once he bet I wasn't sure if I should raise. What do you think? Do you think he is going to call with a worse hand? Would I have been losing equity had I just called?
Poker Stars, $0.10/$0.25 NL Hold'em Cash Game, 5 Players
LeggoPoker Hand History Converter

UTG: $16.95
Hero (CO): $25.15
BTN: $12.20
SB: $9.95
BB: $38.50

Pre-Flop: 9[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/spade.gif[/img] dealt to Hero (CO)
UTG calls $0.25, <font color="red">Hero raises to $1.25</font>, 3 folds, UTG calls $1

Flop: ($2.85) K[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">UTG bets $0.50</font>, <font color="red">Hero raises to $2.50</font>, UTG calls $2

Turn: ($7.85) 3[img]/images/graemlins/heart.gif[/img] (2 Players)
<font color="red">UTG bets $0.50</font>, Hero calls $0.50

River: ($8.85) T[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">UTG bets $3</font>, <font color="red">Hero raises to $9.50</font>, UTG calls $6.50