Dumb overbet 50nl but question

Ok, this is like the first 3bet he's called all match and I probably shouldnt haver bet so much on the turn, but even if I bet 16 or so and he shoves I have to call right?... Any comments appreciated. Thanks.


PokerStars No-Limit Hold'em, $0.50 BB (2 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

Hero ($67.45)
Button ($44.90)

Preflop: Hero is BB with Ahttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, Khttp://www.flopturnriver.com/phpBB2/...iles/spade.gif.
Button raises to $1.5, Hero raises to $5, Button calls $3.50.

Flop: ($10.25) 7http://www.flopturnriver.com/phpBB2/...iles/spade.gif, Khttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, 8http://www.flopturnriver.com/phpBB2/...iles/spade.gif (2 players)
Hero bets $8, Button calls $8.

Turn: ($26.25) 8http://www.flopturnriver.com/phpBB2/...iles/heart.gif (2 players)
Hero bets $31, Button raises to $31.9, Hero calls $0.89.

River: ($90.05) Qhttp://www.flopturnriver.com/phpBB2/...es/diamond.gif (2 players)

Final Pot: $90.05

Results in white below:
Hero has Ad Ks (two pair, kings and eights).
Button has Jc 8c (three of a kind, eights).
Outcome: Button wins $90.05.

Looking at it again I guess this wasn't that bad of an overbet... But is this standard what I did here, or is only better calling this bet? Can we expect QQ JJ KQ to make this call?? Thoughts anyone? That was kind of my concern and the reason for the post.