Is it obligatory to inform spouse of previous sins and misconduct
Question

                A woman says she married a virtuous man. But she had committed things 
before marriage that Allah disapproves of. Now her conscience pricks her. She 
would like to know if it is necessary for her to confess to her husband what she 
used to do before marriage?
Praise be to Allah.No, it is not necessary for either of the two spouses to inform the other of what they used to 
do before their marriage. Let he or she who happens to have fallen in such evils conceal 
himself or herself just as Allah has concealed them. A true repentance should suffice.
As for he who married a virgin, but it became apparent to him at consummation that she is 
not so for reasons of promiscuity committed before marriage, then he has the to take back 
the mahr (dower) he paid her and separate from her. Nevertheless, if he finds that she has 
truly repented, then if he keeps it confidential and conceals the matter and retains her in 
marriage, surely he will be rewarded for it by Allah.