Good spot for a river overcall?

Hey guys,

pretty loose 5/10 6 handed game, but you wouldnt know it from this hand. fairly tight opponent opens UTG+1 (tight by 5/10 standards, not mousish or anything. he's still > 20 VP$IP if I had to guess). and I three bet on the button with A [img]/images/graemlins/diamond.gif[/img] J [img]/images/graemlins/diamond.gif[/img]. kind of too loose and kind of too passive BB calls, tight player calls.

Flop A [img]/images/graemlins/spade.gif[/img] J [img]/images/graemlins/heart.gif[/img] T [img]/images/graemlins/heart.gif[/img]
they check to me, I bet, they both call

Turn is like the 3 [img]/images/graemlins/club.gif[/img] or some other innocuous card
they check to me, I bet, they both call

River is the 6 [img]/images/graemlins/spade.gif[/img] or some other random crap
BB checks and now the tight player leads out. get BB's overcall? I think a raise is spewing.