50PL: K7o Steal -> good thin vbet or idiocy?

[Antinome]

Full Tilt Poker, $0.25/$0.50 PL Hold'em Cash Game, 5 Players
LeggoPoker.com - Hand History Converter

Hero (BTN): $40.05
SB: $72.95
BB: $98.20
UTG: $52.95
CO: $72.05

Pre-Flop: 7[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/club.gif[/img] dealt to Hero (BTN)
2 folds, <font color="red">Hero raises to $1.75</font>, SB folds, <font color="red">BB raises to $3.60</font>, Hero calls $1.85

Flop: ($7.45) 4[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img] 5[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">BB bets $3.70</font>, Hero calls $3.70

Turn: ($14.85) 6[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $7.40</font>, BB calls $7.40

River: ($29.65) 7[img]/images/graemlins/club.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $14.80</font>

I have seen this villain call a flop b3bai with MP, but his opponent (SB) had two overs and no draw, so maybe that was situational. He doesn't seem awful.

I'm short because I called down that same opponent (SB) with TP2K when he had aces recently, and am waiting until I calm down to rebuy. I'm not super-tilty, but I usually impose a cool-off period after a big pot where I did something marginal and lost.