Musleh Maud
The Promised Reformer (Musleh Maud) saga starts from the same time as Muhammadi Begum, in fact in the same advertisement. Even before Mirza Ghulam Ahmad claims to be the re-incarnation of Jesus - he is attributing Messianic qualities to this son. Most likely it was an enticement to the family of Muhammadi Begum that any son born to her would inherit his spiritual estate: