The basic gist is, my MC found out her husband is cheating on her. She invited the mistress over to discuss the situation. She poisoned a brownie, but kept it set aside until the mistress started acting like a bitch. Being a good little hostess, the MC then handed the plate holding the poisoned brownie to the mistress.

And now she's quietly freaking out, trying to figure out how to dispose of the body before the kids get home from school. ;)

I have lines like "I don't think deer eat hot dogs", so it's pretty obvious that I'm not taking the whole thing too seriously.