DD'ed due to privacy (and being neurotic). Thanks everyone for not quoting me as requested!
A general summary of the post (so other people can use it if this comes up for them): a bride asked me to maybe replace a BM who might or might not be able to attend the wedding. I haven't heard anything about it in a few months. Is it okay to ask the bride if I'm going to be a BM in her wedding or if the other BM is attending.