My wife eats a lot after after a long day of taking care of our baby. Is it normal?

They say breastfeeding is equivalent to running 8 miles a day. It is not just the calories used to produce the milk, caring for a baby takes a lot of energy too! I get hungry after most of my baby's feed. It is better to have small and frequent meals as compared to one big meal. Eating healthy helps too! You can ask your wife to sneak in healthy snacks like fruit smoothie, fruits etc.