Perhaps I missed it but is it known specifically why that person was uninvited to begin with?
They were warned by others that the speaker and her boyfriend are troublemakers: > My team and I were contacted by different people to warn us that they were uncomfortable with the participation of a speaker and her boyfriend in our conference. They told the organization of the conference that this couple had caused problems to women in the community.
Also, a couple causing problems to women? That sounds extremely fishy.