Villain is standard TAG or thereabouts.

Dumb river bet? Check and let him hang himself?

Poker Stars, $0.10/$0.25 No Limit Hold'em Cash, 6 Players
Poker Tools Powered By Holdem Manager - The Ultimate Poker Software Suite.

Hero (BTN): $32.03 (128.1 bb)
SB: $25.25 (101 bb)
BB: $29.40 (117.6 bb)
UTG: $40.08 (160.3 bb)
MP: $68.92 (275.7 bb)
CO: $6.10 (24.4 bb)

Preflop: Hero is BTN with 5 5
UTG folds, MP raises to $0.75, CO folds, Hero calls $0.75, 2 folds

Flop: ($1.85) J 7 5 (2 players)
MP bets $1.25, Hero raises to $3.50, MP calls $2.25

Turn: ($8.85) 2 (2 players)
MP checks, Hero bets $3.50, MP calls $3.50

River: ($15.85) 7 (2 players)
MP checks, Hero bets $10.50