ADvice needed on how to proceed

Hi My brother got married on Feb 9, 2023 (In new delhi). The wife went back home on feb 12 and came back on Feb16. And then they went on honeymoon on Feb 19 and came back on Feb 23. The marriage was not consummated, the girl was;nt talking to the husband, the girl stayed in hotel while on the honeymoon while the brother went out alone for all the spot seeing. The girl has gone back to her mother and fathers home in Lucknow on Feb 26 and since then has not called the boy even once, not has she tried to get in contact with him. She called her mother-in-law on Feb 8 for 30 seconds and sent her two pictures over whatsApp, as a proof I guess that she was in touch with the in-laws. B/w Feb 26 and today Mar 24 the parents of the girl have called my mother (Mother-in-law of the girl) multiple times every time blaming her and the boy for not having treated the girl as a family. We have just come to know that she was engaged or married earlier to someone but her engagement/marriage was broken- a fact that was hidden from us during the time of marriage discussions. Also, I don't know how important it is in the eyes of the Law but while matching kundali's also they lied to us telling us that it is a good match, which we stupidly and blindly believed. The girl has taken all the jewelry that was given to the husband and wife with her to Lucknow and it is event that she has no intentions of staying with the husband or his family. Also, the parents have left no stone unturned to demean my mother over the phone. we wish to put an end to our agony and suffering. Kindly suggest the best possible route. Also, throw some light on the following: 1) How to file for annulment of marriage and Is annulment equivalent to divorce i.e., can my brother remarry. 2) How to file for "No-Fault Divorce"? We do not wish to get embroiled in an court proceedings extending for ages. 3) The girl is a doctor who practices on and off, and her father is a very well off wealthy person residing in Lucknow. They have no girth of money. We are not rich like them. In a marriage where the girl has lived with us in her married house for not more than 5 days, can she ask for alimony? 4) Is there a way to check the boy's virginity? Since the girl by her own admission has been sexually active for some years but the boy is never indulged in a sexual act with anyone. 5) Will filling for No-fault divorce from Delhi give us any advantage since the father of the girl has a lot of JUGAAD in lucknow.