99 flops overpair linecheck

[unzip]

First round in the table.
Never seen aggro villain before.

Party Poker 0.25/0.50 Hold'em (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is UTG+1 with 9[img]/images/graemlins/heart.gif[/img], 9[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, Hero calls, <font color="#666666">2 folds</font>, MP3 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">Button raises</font>, SB calls, <font color="#666666">1 fold</font>, Hero calls, MP3 calls.

Here I sometimes call, sometimes raise. But in the new table I tend to call w 99 EP

Flop: (9 SB) 3[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, MP3 checks, <font color="#CC3333">Button bets</font>, SB calls, <font color="#CC3333">Hero raises</font>, MP3 calls, <font color="#CC3333">Button 3-bets</font>, SB calls, Hero calls, MP3 calls.

I go for a check-raise on this board. No reason not to think I have the best hand here. I'd like to see MP3 fold if its 2 cold to him. Nothing of this happens - MP3 coldcalls + Button 3-bets. I call since I see no value in capping. Button is overpair (more likely) or overcards + flush draw (less likely) or 88 (I doubt it). MP3 is flush/straight draw or 8. SB dunno and don't care much at the moment.

Turn: (10.50 BB) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, MP3 calls, <font color="#CC3333">Button raises</font>, SB calls, Hero folds.

Good card for me. I decide to bet so it wouldn't be checked through w draws. I get to put MP3 in bad positions between 2 aggros. Button I expect to raise with hands that beat me and go to calldown mode with hands that I beat. Once Button raises I cant think of worse hands he would do it with and fold.

Thoughts/comments/critique please.