I just wanna beat you

[SGS]

So I have AA UTG+1 in a 2/4 6 max game at party and raise UTG limper to 16 and all fold to UTG limper who calls. UTG limper seems to be ok, I played with him a little before and was killing him in that game. In the previous game he even said somethin about it. Something to the effects of "I just want to beat you, you are killing me." Not sure if he remebered, but probably. He has roughly 365 i cover. So anyways, to the flop.

FLOP 4,5,10 rainbow

He bets 25 and I make it 70 to go. He calls without much hesitation.

TURN 7h two hearts now

He checks and I check behind.

RIVER 2o

He immediately pushes in for 271, which I have never seen him make an overbet like this. What do you do?

SGS