What is the ruling on Hajj if madhy (pre-seminal fluid) is discharged from the pilgrim in a state of ihram due to talking to his wife or thinking about divorcing her, knowing that he frequently experiences madhy and that this Hajj was on behalf of his father?

Hajj is not invalidated by the emission of madhy (pre-seminal fluid), but its emission originally nullifies ablution (wudu'). So, if madhy is emitted during tawaf (definition) (circumambulation of the Kaaba), one must exit the tawaf, purify oneself, perform ablution anew, and restart the tawaf from the beginning; because purity is a condition for the validity of tawaf according to most scholars, unless madhy is emitted most of the time and it is difficult to purify from it, in which case it takes the ruling of incontinence (salasil) and does not nullify ablution.