Aria 2-5, 1200 eff 6 handed
UTG straddles 10, Hero opens $35 T9hh in cutoff, V (local 25-year-old pro I've played with before, tough, can be overly post-flop agro) calls on button, all fold.
($95) Flop 4c8hQh, Hero $40 c-bet, V raise $110, H calls
($315) Turn 8c, Hero check, V checks
River Ah, Hero bets $210, V raises all-in to cover my roughly $900 left
Normally a pretty easy fold here, but the bet sizing is so huge. Does a large river over-bet indicate bluff? Why would he bet so much with a boat or K-high flush when the bet size screams "fold"?