Thats a mass overbet by the villain which makes things seem fishy. It also seems that ur set on playin this hand out by calling a bet on flop and turn, so u shouldnt be worried when a rag hits on the river that actually improves ur hand. You think ur hand is good on flop and turn, and became better on the river... why would u fold if you called him the whole way thinking ur K is good? Seems like ur worried about getting 150 in the middle.
I probably would've folded the turn... too risky getting big $ in with no kick no draw