

First of all, hats off to you for helping your sister!!! That is just fantastic. I hope she can get better and resolve the situation so she can eventually nurse. You are going to need to rent or purchase the best pump you can. Anything less will not build your supply efficiently. I do not know if you have considered this, but wet nursing the baby could also be a possibility. Not only would it stimulate your milk production better than a pump, but your sister's baby would be learning how to BF instead of feed from a bottle. When your sister is healed and is able to BF on her own, baby will already know what to do. Naturally this is something that will take a lot of soul searching and discussions between you and your sister, but I wouldn't give up on the idea.
Do not worry about your milk not being nutritious enough for the baby. Breast milk of any kind is far more superior than any formula in the world. Assuming you are in EXCELLENT health, are willing to fortify your diet in order to accomodate the demand of pumping/nursing another baby, you shouldn't have too much trouble.
When/if you do start pumping for the baby, let me know how everything goes! I'm having my second baby very soon and plan on pumping milk for my older one, who will be just shy of 12 months old when his baby brother is born. So I've often wondered myself if I will be able to handle the demand.
Good luck!!!
