Trip 4's, ugly kicker, spewing?

[KidPokerX]

Seat 3's actions didn't suprise me as he is known to act over-aggressive in big pots often with mediocre holdings. Seat 6's re-raise on the turn (after calling the whole way) confused me the most. I thought I was beat on the turn but was going to pay it down ... until the 4 came. Had the 4 not come, should I check/call river?

Party Poker (6 max, 6 handed) converter

Preflop: Hero is BB with 4[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>.
Seat 3 bets, seat 6 calls $20, Seat 1 SB calls $15, Hero Seat 2 calls $10.

Flop: 4[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
Seat 1 checks, Hero bets $10, Seat 3 raises to $20, Seat 6 calls $20, Seat 1 folds, Hero re-raises $20, Seat 3 re-raises $20, Seat 6 calls $20, Hero calls $10.

Turn: T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
.Hero bets $20, Seat 3 re-raises $20, Seat 6 calls $40, Hero raises $40, Seat 3 calls $20, Seat 6 re-raises $40, Hero calls $20, Seat 3 calls $20.

River: 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>Hero bets $20, Seat 3 calls $20, Seat 6 calls $20.

Final Pot: Hero wins $497.00 from main pot.

Results below:
Outcome:
Hero has 4c 2c (four of a kind, fours).
UTG has Js Ad (full house, fours full of jacks).
Button has (full house, fours full of jacks).

Also:
I really thought i was beat on this turn - I figured seat 6 had a FH or better kicker with the 4. When the river came I bet because I figured both would atleast call, but more-likely I figured the FH, or overpair (which was likely as well) would re-raise. I figured betting out would stick with my aggression.