Sick spot. Your small sizing may have induced a bluff check-raise, but river c/r's are pretty nutted. It's hard to comment on what to do here without any reads, but AP I think it is a fold. I would bet like 225, prepared to fold to a jam.
Absent more information fold. River raises are strong and I expect a set or better two pair most of the time. In particular the EP limp/call and then passive post on a dry flop is often a set. AK is not out of the question for some players but few would play it this way and then raise river.
next time don't bet 1/3 on rivers and then get into spots like these where you can level yourself into making possibly very bad folds or very bad calls.
ap river is kinda whatever imo, cant really go wrong with folding in general.
55-60 on the flop. You can get ton of value from Kx. Good bets otherwise.
AP, it's a tough spot. I could see V's range as sets, 78, KT, K9, KQ, KJ here. The only hands you really beat here are KQ and KJ. It's a weird line to raise so much with KQ or KJ. I think I probably make the fold here.
I would bet larger for value on both flop and turn.
River is tough...I want to bet really thin here for value, but the only logical draw got there on the turn (87) so I might have wussed out and checked behind. AP, this is about as easy a bet/fold as you can get...c/c, c/c, c/r is a super nutted line and the chance he is bluffing is really close to 0.
I like a large turn bet and river check. I don't think you can get three streets from a worse hand on this runout. Not a bad line if SB is a passive calling station though.