[50NL] linecheck w/ AA on JJ3 oop

[br.bm]

no reads on Villian, he has ~$25
BB had ~$50

hero is utg+3 w/ AA

hero open raises to $1,75
Villian call
BB calls

Flop ($5,5): JJ3 (rainbow)
Hero bets $3,5
Villian calls
BB folds

Turn ($12,5): JJ3 8
Hero checks
Villian checks

River ($12,5) JJ3 84
Hero bets $5,5
Villian raises to $11
Hero folds



I bet the flop because people tend to call w/ any pocket pair here then checked the turn for potcontroll and tried to get value from pockets on the river.
When he checked behind on the turn I put him on a slowplay or pockets. So b/f river is right? What about my betsize?