Funny hand while heads up for 3,500$$

this was from the 30+r down to heads up. My opponent was absolutely horrible, but with big blinds, it actually made her really really tough. No room to make a mistake with her, which i did many times. Thank god after she crippled me by calling an overpotsized bet with 1 card to come and hittin her flush on river, i came back with a couple of double up's from preflop. Finished her off AK vs. Q10s preflop, she flopped a Q tho which really scared me.

2
Seat 2: crazynuts02 ( $689254 )
Seat 9: i_loveyou ( $570246 )
Trny:17848084 Level:22
Blinds (15000/30000)
** Dealing down cards **
Dealt to i_loveyou [ 3s 7s ]
crazynuts02: what did u hve
crazynuts02 calls [15000].
i_loveyou checks.
** Dealing Flop ** [ As, 9h, Js ]
i_loveyou: nothing
i_loveyou checks.
crazynuts02 bets [30000].
i_loveyou raises [68000].
crazynuts02 calls [38000].
** Dealing Turn ** [ Jc ]
i_loveyou: jk
i_loveyou: strt
i_loveyou bets [86200].
crazynuts02 calls [86200].
** Dealing River ** [ 2c ]
i_loveyou checks.
crazynuts02 checks.
i_loveyou shows [ 3s, 7s ] a pair of jacks.
crazynuts02 doesn't show [ 5s, 6s ] a pair of jacks.
i_loveyou wins 368400 chips from the main pot with a pair of jacks with seven kicker.

** Dealing Turn ** [ Jc ]
i_loveyou: jk
i_loveyou: strt
i_loveyou bets [86200]

Was this read based, or a gut instinct?

Originally Posted by AHiltz

** Dealing Turn ** [ Jc ]
i_loveyou: jk
i_loveyou: strt
i_loveyou bets [86200]

Was this read based, or a gut instinct?

It's standard. He check-raised the prior street. Checking again would basically say "woops, you called."

-'rilla