Congrats on ur new baby and welcome to this forum its nice having u here.
The first few weeks i guess Maggie will show a little jealousy but i know for a fact that after a while they will be the best of friends just remember to share ur attention equally, Maggie will act like the older sister and she will repremand Molly but they tend to sort themselves out and before u know it, they will be inseperable and Maggie will be very protective of her little sister.
Good luck and dont forget we LOVE to see pics on here!