Easiest method is perhaps as fender says, to just sign up for a new name, and tell only those who you want to know it what it is.
Also don't worry about the thing at the end of the emails. That's not her writing that message, it's just what's been put on the end of the chain mail by the first person who created it, as a way to try and get people to send it out. Often they say "send this to 10 people and a beautiful girl will kiss you," or sometimes things not quite as nice.