Mirza Ghulam Ahmad predicted in his book Anjam-e-Atham. p.54, about his second marriage to a woman called Mohammadi Begum. He writes…

“Remember, if the second part of this prediction does not come about, I should be deemed worse than every wicked.”
What was the second part of the prediction Mirza Qadiani referred to?
I shall tell one who may not know it. It was a prediction made by Mirza for his second marriage to an already-married lady called Muhammadi Begum; that is, when her husband would die, Muhammadi Begum, the widow, will marry Mirza Qadiani. 

This was the second part of his prediction to which he referred in his above writing (in his book Anjam-e-Atham) 

But luck did not smile over Mirza Ghulam Ahmad Qadiani, the dejected Romeo. The elusive bride could not be got hold of because her husband, the rival-in-love, Sultan Muhammad, did not die. Instead, the angel of death came to help Mirza Ghulam Ahmad pack up, to carry him to the higher storey! Therefore, this cavalier don met no success with the dona.

Excerpt from the writings of Hazrat Shaykh Muhammad Yusuf Ludhianvi (Rahmatullahi Alayh)