25/15 over 160 hands

Should I have called that river bet? I had no intention of calling a river bet until a 2nd ace came which lowered his chances of having one

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

saw flop

MP1 ($26.50)
Hero (MP2) ($25)
CO ($77.05)
Button ($5)
SB ($25)
BB ($24.25)
UTG ($10.85)
UTG+1 ($24.50)

Preflop: Hero is MP2 with Q, Q
UTG calls $0.25, 1 fold, MP1 calls $0.25, Hero bets $1.50, 5 folds, MP1 calls $1.25

Flop: ($3.60) 5, A, 9 (2 players)
MP1 checks, Hero checks

Turn: ($3.60) 6 (2 players)
MP1 bets $2, Hero calls $2

River: ($7.60) A (2 players)
MP1 bets $4, Hero calls $4

Total pot: $15.60 | Rake: $0.75