abcnews.go.com — Rhonda Tavey lives in Houston, Texas. After Hurricane Katrina, she was passing by the Astrodome in Houston where many of the Katrina refugees had evacuated. Rhonda stopped to volunteer. That's where she met Erica Alphonse, the 22-year-old mother of the five children, ages 3 to 8. She's 22. She has five children. Do the math. No mention of a dad...