We have came across some information in terms of Mirza Basheer-uddin Mahmud Ahmad, the Khalifa, and the Lahori-Ahmadis.  The Khalifa claims to have been sent a letter from some anonymous Lahori-Ahmadi wherein they accuse the Khalifa of committing adultery on a daily basis.

Summary of this quote
Refrence from al fazl says mirza qadiyani had committed adultery rarely whereas Mirza Mahmood commits adultery all the times.

Mahmud Ahmad also says in this letter
” and from this accusation, you can tell that this person ( accuser) is a peghani ( literally a messenger, aka a Lahori-Ahmadi) that he had this kind of view about the promised Messiah”

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The letter