My Melody- letting momma sleep!

The last couple of nights, Melody has been sleeping in about 3 hour stretches! She hardly fusses and usually just needs to suckle a pinky finger after her meal and goes back to sleep. She's such an angel. I've been mainly expressing my breastmilk and a couple times a day supplementing with formula. I need to give my boobies a rest from her strong sucking power! When I do put her back on the breast she hasn't had trouble so far with nipple confusion. She is just a doll. She eats about 3 ozs each feeding time now. When we first brought her home she was only having 1-2 ozs per feeding.