Ps, birdgirl is right. She needs you for business reasons. Specifically financial reasons.
She's broke and has a kid that some guy isn't paying support for.
She figures you'll take her back with open arms.
You are a saftey net, not an object of pure love and devotion.
She will drag you in to some ugly shit that believe me, you don't want or need.
She will age you and break your account. You will be left high and dry.
She is looking for a sympathy guy and you are it.
RUN!
oh yeah DON'T LOOK BACK...JUST RUN!