For the majority of your session, I suggest dressing your baby in a simple onesie (white, cream or neutral, or soft pastel) or a knotted gown. Keep the outfit comfortable, but snug so that we can see just how tiny & cute your little one is!
Lifestyle sessions are photographed in your home where you are the most comfortable. They should therefore complement your home and surroundings.
Mom >> Long maxi dress, leggings & a cute sweater... you'll want to be comfortable post baby, so choose something that you feel great in that is comfortable. If you're nursing, keep that in mind for mid-session feedings!
Dad >>Dark jeans or colored khakis, and a plain t-shirt or sweater.
Siblings >>Knit dresses, leggings, overalls, or jeans & a sweater.
Go ahead and skip the socks & shoes here too... bare feet look most natural in your home.