I think sets are pretty much out of the question here.
Most people would raise here with sets. As well as the flopped nuts.
They'd want to get money in, so they would try and build a pot.
So, hands that we are worried about
: 98, 97, and 9
4
J
T
?
Hand that still have really good equity: J
9
, T
9
, 4
5
, 4
6
(although, I've gotta feel a lot of those hands raise might get some more money in on the flop, spade draws, and straight draws, overs, pairs.
I think a lot of V's ranges here are naked flush draws, flush draws with a pair, straight draws that turned a pair, 1p + turned straight draw (hands like 76, 54 because people are stupid like that) and some weak 8x hands. The 8x hands are likely folding to a decent sized bet no matter what we do, but almost everything else in their range is calling a bet, and a pretty healty sized one. I'd go 4/5 pot here for value expecting to be called by one or both of them.
I'm check/calling most blank rivers though as I think almost none of that range will call a value bet on the river, and check/deciding on a lot of ugly river cards.