*grunch*

I agree with the preflop cold-call.

I would lead this flop. I like the lead for two reasons: 1) it's possible this is a value bet--the range of hands to which you are behind is fairly narrow; 2) it defines your hand and gives you better information. If UTG+1 raises still (which seems fairly reasonable to assume), I'd call. It is just not that likely that a 3-bet will really protect your hand--even if UTG+1 will raise with AK UI. That is, with the BB and MP1 (who cold-called) still in the hand, the 3-bet is unlikely to protect your hand, and if any of these players does hold AA-JJ, or AJ (or the somewhat unlikely but still possible J6), you are just giving money away.

Having done that, I'd check-call the turn and river. I have no idea what this river bet is supposed to represent, as it certainly is not an effective bluff.