He had a belt because he had this warped perverted thing that Myesha was having sex with her little brother and they was fondling each other -- that would be his reason.
他用皮带这种扭曲变态的东西是因为 Myesha当时正在和她自己的弟弟做爱 然后他们还互相爱抚--这就是原因。