TT vs. 3 loose passives, value bet river?

[jb9]

SB, BB, and UTG+1 are all fairly loose passive.

No one bets except me, but the board is paired, there is an overcard to my pair, and the river card completes the flush and a (somewhat unlikely) straight.

The pot is big enough that I think I have to call if I bet and get check raised, although I'll almost surely be beat.

Value bet or free showdown?

Party Poker 2/4 Hold'em (9 handed) converter

Preflop: Hero is MP3 with T[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, MP1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, Button calls $2 (All-In), SB calls, BB calls, UTG+1 calls, MP1 calls.

Flop: (11 SB) 3[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(6 players, 1 all-in)</font>
SB checks, BB checks, UTG+1 checks, MP1 checks, <font color="#CC3333">Hero bets</font>, SB calls, BB calls, UTG+1 calls, MP1 folds.

Turn: (7.50 BB) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players, 1 all-in)</font>
SB checks, BB checks, UTG+1 checks, <font color="#CC3333">Hero bets</font>, SB calls, BB calls, UTG+1 calls.

River: (11.50 BB) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players, 1 all-in)</font>
SB checks, BB checks, UTG+1 checks, Hero ...