Is it wrong that I don't want my boyfriends sisters friends around my son when they are born? She…

Is it wrong that I don't want my boyfriends sisters friends around my son when they are born? She always brings them around and it's people we never met and one of these people just ended up in jail for assaulting a teacher while already being on probation. I'm a first Time mom and I just want to keep my baby safe but I'm not sure what to do