When my sister and her kids come over

Me:gives my sister cookies

Sister:gives cookie to all kids even mine

Me: he can't have cookie!! He didn't eat his food !

Sister: give the baby cookies!!

She ends up giving him a cookie -_- and calls me a bad parent cause I don't give my son treats as much ..but yet her daughter is the one with teeth problems -_- ..no no my son has a limit on treats RIGHT After HE EAT FOOD ..