Flopping an over pair 99 - Who is right..... me or my brother??

[XxGeneralxX]

Me and my brother have been arguing about poker since we started. I play a smarter, tighter game and he acts like a loose cannon always trying to get all his money in the middle and cries and wines about his "bad beats"

I was playing in a .5/$1 (6) max room sitting with the max of $100. I get 99 in the big blind. There is an UTG limper and the guy in second position also limps. small blind calls and I raise 4x to $4. The UTG limper re-raises to $12 and the limper from second position CALLS. Now its on me and my pocket 99 has shrunk. I call.

Flop 8c 6d 2d

I check........... UTG bets $35
guy in second position folds
now its on me, im sitting with my over pair. what would you do???

"My brother says to put him all... your an idiot, u have an overpair." "He has AK or AQ i garuntee it."

hmmmmmmmmm..... ive invested $12 into this pot and the guy was sitting with more that $100 so it was certainly going to cost me ALOT more that $35 to see his hand.

Lemme see your responces and ill tell you what i did.

THANX