Women attending a nikaah in the musjid
Q: My brother is having his nikaaah at a masjid in December. He is insistent that his future wife would like all the women to attend the nikaaah at the masjid. He says that there will be separate facilities and the women will be wearing masks as a hijaab. He wants hadith or a valid reason as to why women should not attend. He also says if Nabi (sallallahi alayhi wasallam) didn't forbid it then why are certain Ulama say its not permissible while other Ulama say it is correct to attent provided there is separation. He argues that my mother should attend and keep family ties.
Could Moulana please inform me from the hadith and teachings of our Nabi what would be the correct thing to do.
He says that he will not set foot in his mother's home if she refuses to attend his function at the masjid.