50NL: 53s makes baby flush on river

[Ryanj37]

Villian is 14/4/2.5 over 110 hands and seemed solid so far.

Titan Poker Sondrio 0.25/0.50, hand converted by the iPoker Converter at Talking-Poker

Button ($45.70)
SB ($23.55)
BB Hero ($61.90)
UTG ($43.70)
UTG+1 ($8.75)
CO-1 ($52)
CO ($41.97)

Preflop: Hero is in the BB with 5 3
UTG calls 0.50, 5 folds, Hero checks.

Flop (1.25) 4 T 2
Hero bets 1.50, UTG calls 1.50.

Turn (4.25) T
Hero checks, UTG bets 3, Hero calls 3.

River (10.25) 7
Hero bets 8, UTG raises to 20, 1 fold

[rjacobs003]

I probably call this but that could be because I hate laying down flushes! Mind you, a read on the river would be nice. How quickly does he make this bet? If it's a knee-jerk reaction, I'm more inclined to call as I'd then have to put him on an overpair or maybe a set of tens.