Denise,
I think it would be so nice for little Macy to wear her big sisters clothes too. BUT the other thing I was thinking is that you really do not have to make this decision now. Why don't you just think about it for a little while and see how you feel once you get little Macy there at your home. No reason to rush into a decision that is too emotional still. You know?
Hang in there girl - there will be bad days and good days but you know we are all here for you and love you!