How do you handle a situation like mines baby mama drama?

You can sue her you know.I dont know what you call it,but you can.He needs to tell her to stop comming to his work place period.He can lose his job that way.And shes just trying to ruine a happy home but dont let her get the best of you.Be strong,do some research and maybe talk to a lawyer,for advice or counsoler.Good Luck.