88, double paired board- river question

[sin808]

No particular reads, table is fairly aggressive pre and post flop, loose about 40-45 VP$IP, they're playing any face card. Lots of check-raising going on, blah blah blah.
Since no one else was being particularly aggressive in this hand when the board paired again on the river it made me wonder (since it was unusual to have anyone, let alone 2 calling down the whole way)- should I have bet it? Tx.

Party Poker 1/2 Hold'em (6 max, 6 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is Button with 8/images/graemlins/club.gif, 8/images/graemlins/spade.gif.
UTG folds, MP folds, CO calls, <font color="CC3333">Hero raises</font>, SB folds, BB calls, CO calls.

Flop: (6.50 SB) 7/images/graemlins/diamond.gif, 6/images/graemlins/club.gif, 6/images/graemlins/spade.gif <font color="blue">(3 players)</font>
BB checks, <font color="CC3333">CO bets</font>, <font color="CC3333">Hero raises</font>, BB calls, CO calls.

Turn: (6.25 BB) 3/images/graemlins/heart.gif <font color="blue">(3 players)</font>
BB checks, CO checks, <font color="CC3333">Hero bets</font>, BB calls, CO calls.

River: (9.25 BB) 3/images/graemlins/diamond.gif <font color="blue">(3 players)</font>
BB checks, CO checks, Hero checks.

Final Pot: 9.25 BB
<font color="green">Main Pot: 9.25 BB, between CO, Hero and BB.</font>

[Stormwolf]

Sounds like they want to showdown their high cards/small pairs(few draws possible), they may be slowplaying but since their aggro they would have probably tried to go on war with you earlier

[kiddo]

If u bet turn u have to bet river, why should another 3 help them?

[JRichman]

Easy river bet at a 1/2 table. Most players will call you down with any A, and you are unlikely to get raised, as if someone had a 6 you would have almost certainly already found out about it.

[Peter_rus]

Assuming action on turn and flop it's easy bet. Prepare to see any seven or any ace most of the time.

[Jeff W]

You have a value bet on the river, sir.