Child Abuse

I have my relative here who is known as Atieno. She did not finish her learning. She was married just recently with a men who is a drunker. She took my sister Adhiambo to learn in school nearby their home.
When Adhiambo went there she refuses to take her to school. Dont know how will we remove her there. please help.

Location: Kibera-Silanga, Nairobi, Kenya