Pocket Jacks WSOP ME

[bruce]

Third level day 1 with blinds of 100/200. UTG makes it
600. He has played very few hands. He has around 10000.
I have around 6000 and I call with pocket Jacks in late middle position. Button also calls with around 16000. Button's play is a little loose.

Flop comes 3 6 8 rainbow.

UTG bets 1000 and I raise to 2500. Button calls and
UTG calls.

Turn 3h 6s 8c 7h

Check, check, check

River 3h 6s 8c 7h Th

UTG bets 2500. What's my play?

Comments appreciated.

Bruce