Reads:
V1: Is mid thirties and seems fairly competent at poker but has been playing aggressive and made a few questionable calls. Hero's friend won entire stack off him earlier and is now sitting behind him yacking it up, V1 is visibly frustrated but clearly not on mega-tilt and hero + friend are drinking and loud at table.
Hero: Hero is early 30's and has been fairly aggressive at the table as well, taken a few pots off V1 and slightly bullied from position but really no other reads or hands of note.

Preflop:
Hero (700) JJ
V1 (900)

2 limpers, V1 raises to 20 in Mid, Hero 3bets 65 on button, only V1 calls.

Flop (140) Q46
V1 checks, Hero bets 110, V1 calls.

Turn (360) 9
V1 checks, Hero bets 200, V1 calls

River (760) 9
V1 goes all-in, Hero has roughly 350-400 left ????

Odd spot for V to bluff - 57s (or super loose 78s) seems unlikely to ever do this and I can't find any other bluffs that ck-c hero larger flop sizing. I'm just folding a ton, but I'm probably not putting 200 in ott either only to bluff catch the riv.

All sets are reasonable w a board lock QQ being a likely contender for the slowish line.

I think I'm checking back that flop a lot. I don't think you have the best hand on the river often enough to call.

As played, pretty ez fold.

Pre - ok.
Flop - Depending on his 3-b call range, I might check back. If betting, I'd go $65-75.
Turn - once he calls ~80% PSB on the flop, I'm checking back. What hands are you getting value from?