Good evening nairaland.

I am a married man and I have six children. When I met with my first wife she was a single mother of 1 girl she was a years 6 months we got married when she was 5 years old.
We had 3 children together making them 4 unfortunately we lost her in 2016 during the birth of our twins.

Before she passed on she asks me to promise her that if anything happened to her I should never send her daughter back to her family to experience the same thing she went through in there hands.
I have promised her that the child is mine and she will never go anywhere the day she will leave my house will be on her wedding day.
I have also promised her that nothing will happen to her and we will grow old together. Unfortunately we lost her and I have continued being a father to all four children and I have never treated my step daughter differently.

I have since remarried and we are blessed with twins. When I met with my current wife I didn't tell her that my step daughter is not my biological child she knew she was my first child.
She has been a part of me ever since she was 1 plus and I didn't think it was necessary telling my wife she was not my child.

She was treating all four children good until my wicked aunty has spill the beans which I have apologised for not telling her in the first and I have asked her to continue being a good mother she was before knowing the truth.
But she refused saying I didn't tell the truth and the child should go and leave with her mom family. I have explained to her the reason why she cannot stay with them to no avail and I ask her not to tell the child the truth but she has told her.

It wasn't easy for her knowing the truth she asks me if I will take her back to her mom people I said no. She is still my child and she will not go anywhere and I will resolve the problem very soon.

Unfortunately my wife has totally changed so much toward the child and I hate coming home seeing her crying all the time. She feel insecure in the house knowing that she is not the biological child of the house.

Talking to my wife was to no avail she has insist that the child must go back to her mother family or they will be not peace.

I reported the problem to her people nothing was done and we are still dealing with the same thing everyday.

Honestly speaking I hate being in such a messy situation but I will not send her back to her mom family she is my first child and I have made a promise to my late wife that the day the child will leave my house it will be the day she will get married.
Since my wife want her to leave and the child is already depresses.
I have come to conclusion I will not divorce her but I will rent a 2 bedroom apartment for her to be staying with the twins while I continue staying with the four children in my house I owe the house.

I haven't told her anything about my decision yet and I want to know if getting her own house will help the situation. This is where I need your advice nairalanders what do I do in this situation?