PokerStars No-Limit Hold'em, $0.25 BB (8 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($16.70)
BB ($23.25)
UTG ($36.05)
Hero ($24.55)
MP1 ($10)
MP2 ($28.45)
CO ($24.05)
Button ($23.80)

Preflop: Hero is UTG+1 with K, K.
UTG calls $0.25, Hero raises to $1.25, 6 folds, UTG calls $1.

Flop: ($2.85) 8, T, 4 (2 players)
UTG checks, Hero bets $2.5, UTG raises to $5, Hero raises to $10.25, UTG raises to $15.5, Hero...

Villain is like 20/3/.8 over 40 hands or so

Seems like a set given the aggression from this kind of passive... Would v really do this with a draw or TPGK?