Interacting With Non-Muslim Niece Who is Having Child Out of Wedlock
Question

                My sister’s daughter is not Muslim and she is going to have a child but without marriage; she does not intend to get married. I have two daughters and I have decided to tell my sister’s daughter that I cannot remain in touch with her unless she gets married, because I cannot expose my two daughters to her way of life. I do not want my daughters to see their cousin having a child without being married. Personally, I do not know how I can approve of her having a child. In fact I do not know how I should interact with her when I know how she got pregnant with this child.

I hope that you can offer me some advice on how to deal with this situation.
Praise be to Allah.
    Firstly: 

    We appreciate your concern about this issue, which is 
    indicative of a high level of piety, and your keenness to raise your 
    daughters in chastity and purity. This is an obligation that Allah has 
    enjoined upon fathers and mothers. It is important to pay more attention to that upbringing if the Muslim is living in a land of kufr (disbelief) or he is living in a Muslim land, but his family are kuffaar (non-Muslims), because of what is involved in 
    that of a great deal of corruption and a lack of helpers and supporters. 

    Secondly: 

    We invite you to think about two things: 

    (1)

    that it is possible that your good relationship with your 
    sister’s daughter may be a strong motive for her to become Muslim. If that 
    happens then it will undoubtedly be good for you, for her and for your 
    family. She may need you more at present than she did before because of her 
    weakness and her need for someone to help her with the hardships and 
    difficulties of life. If she sees you treating her kindly, that may have an 
    impact on her and she may become Muslim, and be saved from an eternity in Hell. 

    (2)

    That if you cut off ties with her and forsake her, that may 
    be a cause of her turning to evil people and their getting close to her; her 
    actions may become more offensive and their effects may – Allah forbid – 
    even reach you because you are her relatives. It may be in your best 
    interests – as a family – to prevent evil and corrupt people from attracting 
    her to join them. Then you will have the reward of preventing those evils 
    from becoming a part of her life and thus protecting your family from the 
    harm that evil people may do to them. 

    This is what we would like to draw your attention to. But if 
    she is of the type that will not soften or respond, and her evil outweighs 
    her good, or there is no goodness in her, then we think that you should cut 
    off ties with her. 

    And Allah knows best.