So sick of my baby getting bit 😭

Brandy

Help my nephew keeps biting my daughter it's pissing me off she don't even do anything to him he just walks up an bites her I am having a hard time dealing with this my nephew's mother smackes him in his mouth but nothing seems to be working she puts him on time out an he laughs he thinks it's funny to hurt her 😣 my baby don't deserve this treatment SoMo e help me stop the biting we live together so seaperatig them isn't an option he's 1 an she's 1 year 7 months someone please help