She is not sure that she is really her father’s child
Question

                What is my destiny, to paradise or hell if I was a daughter of adultery and I was just written in the name of the man I live with as father? What shall I do? Shall I expose this reality and go to detention? Or just stay silent and conceal my family’s secret? How shall I live with a brother who is not from the same father? May Allah forgive my mother, she destroyed me. I am a religious girl, Alhamdulillah. Do not suppose this is untrue and ask for a proof that I am not his daughter, because there is strong resemblance between me and the man whom my mother committed adultery with. Help me, what shall I do?
Praise be to Allah.
    Firstly: 

    The child of adultery is not responsible for the crime 
    committed by his mother, and he is not to be taken to task for it, rather he 
    is responsible for his own actions. If he is righteous and obedient then he 
    will be one of the people of Paradise, and if he is a disobedient evildoer 
    then he will deserve to enter Hell. So in this regard he is like all other 
    people, and there is no difference between him and them. 

    Secondly: 

    If a woman has a husband and she bears a child who could be 
    from that husband (in that he is born after six months of marriage), then 
    this child should be attributed to her husband according to sharee’ah, and 
    it is not permissible to deny that he belongs to him, unless the husband 
    himself denies it and engages in li’aan with his wife to that effect. 

    The evidence for that is the report narrated by al-Bukhaari 
    (2053) and Muslim (1457) which says that Sa’d ibn Abi Waqqaas and ‘Abd ibn 
    Zam’ah disputed concerning a slave belonging to Zam’ah.  Sa’d said: O 
    Messenger of Allaah, this is the son of my brother, ‘Utbah ibn Abi Waqqaas, 
    who asked me to take care of him because he is his son. ‘Abd ibn Zam’ah 
    said: This is my brother, O Messenger of Allaah, the son of my father’s 
    slave woman who was born in my father’s bed. The Messenger of Allaah (S) saw 
    a clear resemblance to ‘Utbah. But he said: “He is yours, O ‘Abd ibn Zam’ah. 
    The child is for the (owner of the) bed.” Then he said to Sawdah bint 
    Zam’ah, who was one of the Mothers of the Believers (may Allaah be pleased 
    with them): “Observe hijab from him, O Sawdah.” 

    If the child was born in the marital bed, he is to be 
    attributed to the husband, and he cannot be regarded as not being his child 
    except by means of li’aan, where the husband engages in li’aan with his wife 
    and denies that the child is his, in which case physical resemblance is of 
    no significance. It is clear from the hadeeth quoted above that the child 
    concerning whom there was a dispute bore a clear resemblance to the zaani, 
    ‘Utbah ibn Abi Waqqaas. This case of zina had taken place during the 
    Jaahiliyyah (i.e., before Islam), and Sa’d wanted to attribute the slave to 
    his brother who had left instructions to that effect (before he died), but 
    the Prophet  (peace and blessings of Allaah be upon him) ruled that the 
    child belonged to the marital bed and attributed him to Zam’ah, who was the 
    master of the slave woman. But in order to be on the safe side, he told 
    Sawdah bint Zam’ah to observe hijab before this brother of hers. 

    So in this case there was both an admission of zina and a 
    clear resemblance (to the zaani), but despite that the Prophet  (peace 
    and blessings of Allaah be upon him) affirmed that the child was to be 
    attributed to the owner of the marital bed. This is because sharee’ah takes 
    a cautious view in order to protect lineages and is keen to conceal sins, 
    for the lineage is the child’s right. 

    Al-Nawawi (may Allaah have mercy on him) said in Sharh 
    Muslim: With regard to the words of the Prophet  (peace and 
    blessings of Allaah be upon him), “Observe hijab from him, O Sawdah”, he 
    told her to do that so as to be on the safe side, because he appeared to be 
    her brother in shar’i terms, because he was attributed to her father, but 
    when he saw that he clearly resembled ‘Utbah ibn Abi Waqqaas, he was afraid 
    that he may have been his child, in which case he would be a stranger 
    (non-mahram) to her, so he told her to observe hijab before him in order to 
    be on the safe side. 

    Al-Qaadi ‘Iyaad (may Allaah have mercy on him) said: The 
    custom during the Jaahiliyyah was to name children after the zaani. They 
    used to hire slave woman for zina, and whoever the mother said that the 
    child belonged to, they would name him after him. Then Islam came and 
    abolished that, and ruled that the child belonged to the legitimate marriage 
    bed. When ‘Abd ibn Zam’ah and Sa’d ibn Abi Waqqaas disputed, Sa’d did what 
    his brother ‘Utbah ibn Abi Waqqaas had asked him to do, in accordance with 
    the custom of Jaahiliyyah, and Sa’d was not aware that this had been 
    abolished in Islam. The child’s paternity had not been stated during the 
    Jaahiliyyah, either because there was no claim or because the mother did not 
    acknowledge that he was ‘Utbah’s child. ‘Abd ibn Zam’ah claimed that he had 
    been born on his father’s bed, so the Prophet  (peace and blessings of 
    Allaah be upon him) ruled in his favour. End quote. 

    Ibn Qudaamah (may Allaah have mercy on him) said: They were 
    unanimously agreed that if a child is born on one man’s bed and another man 
    claims him, he should not be named after him. End quote from al-Mughni 
    (6/228). 

    Based on that, if you were born six months or more after your 
    father married your mother, then you should be named after your father, and 
    your lineage cannot be denied except by means of li’aan. You have no need to 
    have doubts about your mother or think badly of her because you resemble 
    someone else, because people may resemble one another without there being 
    any zina. 

    Whatever the case, resemblance to the zaani or the woman’s 
    admission of zina does not mean that the child cannot be attributed to the 
    husband, unless the husband engages in li’aan. See the answer to question 
    no. 33615 for information on li’aan and its consequences. 

    What you should do is ignore this matter and stop thinking 
    about it, and pay attention to doing righteous deeds and adhering to this 
    religion properly. 

    We ask Allaah to guide you and help you to do that which He 
    has permitted and that which pleases Him.  

    And Allaah knows best.