Double Pair against Set

I played for stacks thinking that the villain could have an overpair played half a trickie.
What do you think?

PokerStars - $0.05 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 116.6 BB
SB: 121.2 BB
Hero (BB): 133 BB
UTG: 139.2 BB
MP: 155.8 BB
CO: 105.6 BB

SB posts SB 0.4 BB, Hero posts BB 1 BB

Pre Flop: (pot: 1.4 BB) Hero has Q♥ 7♠

fold, fold, CO calls 1 BB, fold, fold, Hero checks

Flop: (2.4 BB, 2 players) 7♣ 3♥ Q♣
Hero bets 1.8 BB, CO raises to 7.8 BB, Hero raises to 19.6 BB, CO raises to 104.6 BB and is all-in, Hero calls 85 BB

Turn: (211.6 BB, 2 players) K♠

River: (211.6 BB, 2 players) 4♣

CO cashed out 181.2 BB for a fee of 3.6 BB

Hero shows Q♥ 7♠ (Two Pair, Queens and Sevens)
(Pre 31%, Flop 9%, Turn 5%)
CO shows 7♥ 7♦ (Three of a Kind, Sevens)
(Pre 69%, Flop 91%, Turn 95%)