[200nl] Reraised pot, overbet by villain

[Vammakala]

Party Poker
No Limit Holdem Ring game
Blinds: $1/$2
6 players
Converter

Stack sizes:
UTG: $242.60
Hero: $692.80
CO: $189.69
Button: $196
SB: $204.20
BB: $200

Pre-flop: (6 players) Hero is UTG+1 with Q[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/diamond.gif[/img]
UTG folds, <font color="#cc0000">Hero raises to $8</font>, <font color="#cc0000">CO raises to $24</font>, 3 folds, Hero calls.

Flop: 7[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/heart.gif[/img] ($51, 2 players)
Hero checks, <font color="#cc0000">CO bets $86</font>, Hero has no idea what the overbet means.

I don't have history or stats with the player so I just have to go with what I do know and I know nothing so, what's my line and what do you put this seemingly random opponent on? So far I've showed down only good hands in the table, i'm not quite sure which one of them she has seen.