25 NL rivered 2 pair line check

[crazymoose]

Reads: relevant villain is button with $55. He is 33/17/2.8. I have $37.

Folded to me, I raise ATo in CO to $1, villain calls.

Flop: A72r

I bet $1.50, villain calls.

Turn: 5(completes rainbow)

I bet $2.50, villain calls.

River: 10

I check, villain bets $6, I c/r to $18.

1. Turn bet: too small or just right?
2. River c/r: like or no like?