MP2 with a PFR of 9% he is raising Sklansky group 1-3 hands. That would put MP2 range AQ suited-AT, QQ-TT, and maybe KQ spades. AA, KK, and AK I would think he would reraise to reduce the number of hands drawing against him.

I hate laying down a set here. So I would call the turn, then check call a non-all in river bet.