how's this value bet?

[mike l.]

20-40 good live game. lady who plays ok raises in mp, i 3 bet on button w/ AK, bb who is fishy calls, she calls.

the flop is 986 rainbow, checked to me, i bet, and they call.

turn is a T. checked to me and i check.

river is another 8. at this point i put bb on nothing and lady on AQ or AJ. they check to me again and this time i bet.

good bet or pure spew?