100nl HU river bluff. line check

[IrishPete]

standard short buyin opponent who check-minraises etc. looks like a fish but just started playing. Is this river ok? i was pretty sure he folds like all hands that just call on the flop. if i put him on hearts do i bet the turn here or leave myself some fold equity? i dont see calling as an option on the river fwiw. ty

Edit: he bought in for 40. he hit a set v my over pair early to get up to 80~. also, wen i mention the fold equity i also thought checking was ok [tho i thot he mite have hearts] to keep the pot under control and make sure i wasnt making playing a huge pot with 2nd pair going into the turn.

Full Tilt Poker - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 2 Players - (LegoPoker HH Converter)

<font color="black">BB: $84.90</font>
<font color="black">Hero (SB): $98.50</font>

<font color="black">Preflop:</font> Hero is dealt 8[img]/images/graemlins/club.gif[/img] 9[img]/images/graemlins/club.gif[/img] (2 Players)
<font color="red">Hero raises to $3</font>, BB calls $2

<font color="black">Flop:</font> ($6) 9[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $4</font>, BB calls $4

<font color="black">Turn:</font> ($14) 3[img]/images/graemlins/spade.gif[/img] (2 Players)
BB checks, Hero checks

<font color="black">River:</font> ($14) Q[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">BB bets $10</font>, <font color="red">Hero raises to $40</font>