After he called my turn bet, i really narrowed his range down to As6s,88, TT-QQ (more likely) cuz standard TA would raise their sets in the middle and not be silly to call with small pair plus gunshot. Thinking about this, i raised UTG and repped at least TP or straight even though its unlikely. So how likely is it that you guys could get off your medium strength hands like TT-QQ ? Is my river bet too big given risk/reward for the long run?

Turn: ($54) K (2 players)
Hero bets $25, Button calls $25.

River: ($104) 4 (2 players)
Hero bets $65