ok let me see if i can do this right.

pre-flop: since its a nit table. i would say UTG+1 has a range of small-medium PP up to AJ and MP1 has a range of anything.lol idk what to do about that but lets see the flop

flop: UTG+1 checks which doesnt say shit, MP1 bets less than half the pot which tell me from a 39/37 that hes either value betting and 2-pair or pair+ draw so i would raise to around 3 - 3.25 and see what happens from there. but if u stove ur hand vs. his range ur crushing him about 85% to 15% so get it in on the turn and pray he didnt flop a monster and if he did hope the board pairs!

so what happen? can u post the rest of the hand?