But remember that if you don't like something you don't have to read it. And you can always block me out if that doesn't work for you.
If I block you, I can't read your posts that are not related to jennifer. Also, if I block you (or both of you), I can still see that there is a discussion going on that doesn't belong in the thread. Plus, there might be people commenting your or jennifer's posts, those cannot be blocked.
Perhaps you could start a 'Mike A/jennifer discussion thread'; if jennifer posts something that annoys/offends/whatevers you, you could quote that post in the discussion thread and post your answer there. This would keep the original thread clean.