flop middle set (777), get smooth called by two opponents

[Kips Bay Kid]

I have played about 150 hands with the villain he is a good player with a VP$IP of about ~19%, as the pot grows and you continue to get smooth called do you slow down like I did in fear of set-over-set or do you go to the felt?

PokerStars No-Limit Hold'em, $1.00 BB (8 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

saw flop|<font color="#C00000">saw showdown</font>

CO ($40)
Button ($24.05)
<font color="#C00000">SB ($28.20)</font>
BB ($106.15)
<font color="#C00000">Kips Bay Kid ($159.80)</font>
UTG+1 ($218.35)
<font color="#C00000">MP1 ($105.20)</font>
MP2 ($98.45)

Preflop: Kips Bay Kid is UTG with 7/images/graemlins/heart.gif, 7/images/graemlins/diamond.gif. CO posts a blind of $1.
<font color="#CC3333">Kips Bay Kid raises to $3</font>, <font color="#666666">1 fold</font>, MP1 calls $3, <font color="#666666">1 fold</font>, CO (poster) calls $2, <font color="#666666">1 fold</font>, <font color="#CC3333">SB raises to $5</font>, <font color="#666666">1 fold</font>, Kips Bay Kid calls $2, MP1 calls $2, CO calls $2.

Flop: ($21) 7/images/graemlins/spade.gif, K/images/graemlins/diamond.gif, 4/images/graemlins/heart.gif <font color="#0000FF">(4 players)</font>
<font color="#CC3333">SB bets $6</font>, <font color="#CC3333">Kips Bay Kid raises to $20</font>, MP1 calls $20, CO folds, SB calls $14.

Turn: ($81) 8/images/graemlins/club.gif <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Kips Bay Kid bets $45</font>, MP1 calls $45, SB calls $3.20 (All-In).

River: ($174.20) 3/images/graemlins/spade.gif <font color="#0000FF">(3 players, 1 all-in)</font>
Kips Bay Kid checks, MP1 checks.

Final Pot: $174.20
<font color="#009B00">Main Pot: $90.60, between SB, Kips Bay Kid and MP1.</font> &gt; <font color="#FFFFFF">Pot won by Kips Bay Kid ($90.60).</font>
<font color="#009B00">Pot 2: $83.60, between Kips Bay Kid and MP1.</font> &gt; <font color="#FFFFFF">Pot won by Kips Bay Kid ($83.60).</font>

Results in white below: <font color="#FFFFFF">
SB has Ac Ad (one pair, aces).
Kips Bay Kid has 7h 7d (three of a kind, sevens).
MP1 has As Ks (one pair, kings).
Outcome: Kips Bay Kid wins $174.20. </font>

[TheWorstPlayer]

Nope, definitely bet the river. It's one of those situations where he is likely to call you with a lot of hands that you beat but he won't bet and where you will call a bet from him anyways. No way you are folding that set, so just continue to bet the river.