My husband is a very heavy sleeper, he never hears our three year old at night. However, he also never hears me 36 weeks pregnant going to the bathroom every 45 minutes either, so at least I don't have to feel bad about disturbing his sleep. My daughter was breastfed for the first year of her life and during that time she got used to me being her nighttime comforter. Even if Dad does try to take care of a bad dream, or feeling sick at night, she still asks for Mama anyway. On the plus side, my husband is a very early riser, so on the weekends him and Sara spend the morning hours together, and I get to sleep in! For me, that makes up for it. I love to sleep in, it is what I miss most about my pre-parenting days.