10/20 Weird spot on drawy board

[LAURA74]

MP is 5kaday on Prima. Someone said it was Johnny Lodden but thats only rumors. He is running about 28/20 (1k hands) and I dunno what hes limping.
The turnraise feels extremly strong but what is he supposed to have? Since all the draws I guess he is raising a set bigger.
I maybe should have choosen another line but what do I do here?

UTG ($419.50)
<font color="#C00000">MP ($3736.06)</font>
Button ($1630.00)
<font color="#C00000">Hero ($2706.21)</font>
BB ($2914.00)

Preflop: Hero is SB with 8[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, MP calls $20, Button calls $20, Hero completes, BB checks.

Flop: ($80) 8[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
Hero checks, BB checks, <font color="#CC3333">MP bets $80</font>, Button calls $80, <font color="#CC3333">Hero raises to $280</font>, BB folds, MP calls $200, Button folds.

Turn: ($720) J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $495</font>, <font color="#CC3333">MP raises to $990</font>, <font color="#CC3333">Hero ?