Is there any reason why this isnt an easy fold?

What possible hand can someone with a VPIP of 23 coldcall pre-flop, cold call on a flop of KQ3 rainbow then start going gangbusters when a Q hits?

Maybe I am slightly retarded but doesnt MP3 have KQs/KQo here like 115% of the time?

Then there is also the fact that you have 3 bet preflop and MP1 is raising you here. More often then not you are beating him here but there is an "ok" chance of a hand that is beating you here (KK, QQ trying to play cute preflop, perhaps AQs/AQo/KQs/KQo).

MP3 turn raise combined with the "ok" chance MP1 has you beaten here push the decision to a fold IMO.