When do you find a fold here?

[arcticfox]

Yes, was going to make a crying call on the river, always do with pot that size and am sure its been heavily EV+ by doing it.

I guess my real question is about a fold on 5th given he may have either made a flush, have a set, or 4 to a wheel. Is the pot always big enough at that point to call even with a dead queen? Opponent was an averge player, bit loose if anything from the 30 minutes we'd been playing.