1/1 cash game, Average stack £200.
Hand one: Player X raises with

, reraised by

, both end up all in £150 pot,

hits two pair.
Player X buys back in for £150. Does not look at cards, stating 'if KK isn't good enough, nothing is', pushes all in £150. Everyone folds round to you on BB with £140, you have

.
What do you do? I saw it called in a cash game, never been sure if I'd take the plunge.