I am 27 years old and am having alot of issues with my sons father. First of all he and his sister smoke marijuana ALL THE TIME. I was hopin it would come to an end once my son was born but it has not. His sister keeps insisting that he can take my son from me and that she along with my sons grandmother can do so. I want to get full custody of my son with out them knowing. HELP!!! He cant take my son if hes smoking right???