Magic Forums

Hi, not sure if I'm posting in the right place,
Can anyone suggest a spell or form of protection I can use to protect my baby from a person who wishes us ill, but we have no choice but to see. I just need something that forces the person to not be able to come too close to him or keeps them from holding him. I've tried everything decent and conventional , I know they're easily controlled because they never cross over the salt at my front door, but soon I'll give birth and they will want to see him and hold him and I want to keep them away.
It's not the father of my child, just someone who we can't seem to get rid of and who has a nasty way with children.