V - early 20s, been at the table for a couple orbits, minimal reads, one hand he limp/called pre and went heads up, x/c uncoordinated Jhigh flop with fd, x/x on A turn, and led river for ~1/2pot when flush came in, other player called with KJ and was good.
Hero - late 20s, has shown down no hands and only raised/3bet when entering any pots so far, V has not seen hero do more than raise ip and win preflop, do not believe he had seen any 3bets.
Eff stacks 475. Folds to V in HJ who min raises to 10, folds to hero in SB who raises to 50 with KK, BB folds, V calls.
Flop (105): Qs9d7h
Hero bets 85, V calls. How is this sizing?
Turn (275): Qs9d7h 8d
Hero bets 175, V calls. Again, how is sizing and is this a b/c or b/f?
River (625): Qs9d7h 8d Ah
Thanks in advance for input.