Villain has shown a couple bluffs, but the table is generally passive. What do you think of my play here, and do I call the river?

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Poker Stars
Limit Holdem Ring game
Limit: $0.50/$1
5 players
Converter

Stack sizes:
UTG: $11.75
CO: $15.50
Button: $22.70
SB: $37
hblask: $21.10

Pre-flop: (5 players) hblask is BB with K 7
2 folds, Button calls, SB calls, hblask checks.

Flop: 4 K T (3SB, 3 players)
SB bets, hblask raises, Button calls, SB calls.

Turn: J (4.5BB, 3 players)
SB checks, hblask bets, Button calls, SB calls.

River: 5 (7.5BB, 3 players)
SB checks, hblask bets, Button raises, SB folds, hblask???

Well, his line suggests that he is strong. However, since he is a frequent bluffer, a call is in order here.

Agreed.
His cold-call on the flop could represent great strength.
But hopefully it only means a draw.

The river raise suggests we are behind.
But without a specific read that Villain never bluff raise, I call down 1 bet with Top Pair.
You don't have such a read.
So it's an easy call.

--CM