Mother walked out on my son and I when he was approximately 4 months old. Now my son is 4 years old and has never spoken or been around the maternal mother so the son doesn't even know who she is, he calls my sister mom because she has help raise him. This morning the biological Mother came to my sister's house with the police and took my son saying my sister had kidnapped him. Please inform me what I can do regarding getting my child back?
