Blessings unto all!!

The hand in question.

Blinds 300/500/500

UTG (100k stack and frequent limper) limps under the gun.
Hero: JJ (45k stack) makes it 1.5k
SB (13.4k stack): Calls 1.5k
UTG: Calls 1.5k

Flop 8-6-3 rainbow

SB: Shoves for 12k
UTG: Makes it 30k
Hero: ???? WHAT DO YOU DO?

What do you do with JJ on the cutoff and why? Thanks!