5/10-Weird River check/raise

[sauce123]

converter not working

weak player UTG limps for 10

I raise to 45 in CO with AK

BB calls UTG calls

Flop: 783 r check/check/check

turn: 7 checks around

river: A check check i bet 75 into 140 BB checkraises to 360

BB is running 22/18 and is probably a winner, not that many reads otherwise, probably squeezes a little more often than most. im running tight today like 17/14.5 and have been showing down strong hands.