I've been eating tofu all my life, and unfortunately it hasn't enhanced my breast size. Only becoming pregnant has done that.
If you're really digging that edamame, I'll send you some of my mother in law's homemade natto we have in the freezer.
My brother-in-law wouldn't let my sister eat any tofu during her pregnancy, until they found out they were having a girl. There has been a study that links soy foods (eaten during pregnancy) to some sort of birth defect of the fetus' penis.
Do you like fish? That's a good alternative to red meat.