Rivered flush faces action against TAG, deep stacks

[MikeyPatriot]

Reads: UTG is solid TAG. MP is 60/15/1.5ish and awful despite the stack. BB is 80/25/3ish and also awful. Both will call/bet/raise with any part of the board.

Looking for river help, but any street appreciated.

PokerRoom No-Limit Hold'em, $2 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($160.50)
MP ($963.55)
Hero ($335.20)
SB ($58.00)
BB ($67.10)

Preflop: Hero is Button with 8[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img].
<font color="#CC3333">UTG raises to $3.5</font>, MP calls $3.50, Hero calls $3.50, <font color="#666666">1 fold</font>, BB calls $2.50.

Flop: ($14.50) A[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets $4</font>, UTG calls $4, MP calls $4, Hero calls $4.

Turn: ($30.50) A[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets $6</font>, UTG calls $6, MP calls $6, Hero calls $6.

River: ($54.50) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">BB bets $5</font>, <font color="#CC3333">UTG raises to $20</font>, MP folds, Hero ???

Well, I finally hit my flush...but now a solid TAG is putting in a healthy raise with 2 to act behind, in addition to the lead bettor. Easy fold?