Tough spot. Villain could show up with roughly 7 combos of flushes (KcQc, KcJc, KcTc, QcJc, QcTc, JcTc, Tc9c, even more if he calls more hands preflop). We need like 5 combos that we beat in order to make this call. I think folding is reasonable considering the fact that flush makes so much sense whereas any other hand seems quite unlikely. Huge bluffs like this aren't common and we would have to be up againts an extremely fishy opponent to assume that he would shove something worse for value.

I dont know if I could fold here vs a fish. Obvious we do block other flushes and we dont block any A. it's not rare that a fish will check call twice with A high and just jam on an A river or just random spazz shove whatever he has trying to representing a flush.

I'm calling. Villain is obviously a weaker player that we don't have much of a read on and he could definitely see this as a scare card river that he's trying to bluff or potentially be going for thinner value (less likely).

Thanks for your answers guys. I'm pretty new here so I should post more hands :)