His wife and her family accused him of having something wrong with his mind; should he take a second wife?
Question

                I am 24 years old and I got married a year ago. My marriage lasted only 6 months, after which my wife’s family accused me of being mentally ill. I proved that this was not the case with the help of a government psychiatrist. This is happening to me because my wife’s family is accusing me and she is agreeing with them, may Allaah forgive her. What should I do? Should I take another wife? Please note that the problem with my wife has been referred to the court and divorce proceedings are under way. If I get married [to a second wife] now, will there be any sin on me?.
Praise be to Allah.
    Proof that a person is in good mental health and treats 
    others well does not require the testimony of a doctor. What matters is what 
    people see of a man, not the papers he produces.  

    Hence if the accusations of your wife’s family are based on 
    things that they have seen you do or words that they have heard you speak, 
    then they may have a reason. You have to sort yourself out and mend your 
    ways so that there will be nothing for others to judge you by.  

    If what they said about you has no real basis, rather it is 
    false and sinful testimony, then we think that you should advise them and 
    explain to them that their false accusation against you is sinful, and tell 
    them how that has caused division between you and your wife. If they recant, 
    then all well and good, otherwise you should shun them, and not let them 
    visit you or let your wife visit them, lest they turn her against you. 

    With regard to your intention of taking a second wife, what 
    we advise you is to wait and to examine the real motive for that, because 
    often in such cases the decision is based on the desire for revenge against 
    the first wife and her family because of the trouble they caused, and 
    usually when a man marries with this attitude it leads to trouble for the 
    second wife too, if the husband has not set things straight with his first 
    wife and her family. 

    If you have not set things straight between you and your wife 
    and her family, we think that if you want to take a second wife, you should 
    let the first wife go and divorce her, or you can keep the first wife if you 
    intend to keep both wives if Allaah guides her (the first wife). We also 
    advise you to have a good intention and try to do the right thing, for 
    Allaah says concerning spouses between whom there are difficulties 
    (interpretation of the meaning): 

    “if they both wish for peace, Allaah will cause their 
    reconciliation. Indeed Allaah is Ever All‑Knower, Well‑Acquainted with all 
    things”

    [al-Nisa’ 4:35]
We advise you to fear 
    Allaah with regard to every step you take and not to let this problem cause 
    you to treat her unjustly or to keep reminding her of mistakes that she made 
    but that she has apologized for.

     We ask Allaah to set your affairs straight and to make it easy for both of you to do the right thing. And Allaah is the Source of strength.