Ok, I've run the situation several times in my head and here's what I came up with. If I 3bet, I don't much care what shortstack does. Here's why:
-UTG folds- I'm more than happy to stack of with Mr. Shortstack
-UTG 4bets- I don't care cuz I'm outta the hand.(no odds if UTG raised appropriately)
-UTG Calls- Short stack can call/fold/shove.
----call-fine, he's probably dead money anyway(since he's obviously a donk if he's short stack and calling in this situation.)
----fold-fine
----shove-fine I'm probably shoving right back since UTG has already said he doesn't have stack-off material.

So All I'm really worried about is UTG. So why am I 3betting my B range here? AGAIN:

UTG Folds-Great
UTG Calls-not so great, now I'm still set hunting, but at a higher price. and can still be drawn out on.
UTG Raises-I'm done.

So I'm probably just cold calling this situation and doing a regular old Set hunt. Besides I've got position so I should be in good shape if I hit.

NOW! Tell me where I'm wrong.(Not being sarcastic.)