Some good advice here already. Just a couple of things to add.
It would be best if you could introduce them on neutral ground. Let them sniff and get to know each other for a little while somewhere other then home. Then your girl won't think she has to protect her territory right off the bat.
Don't let your girl dominate the puppy. YOU are the pack leader, all others must get along and obey you. I always let Boo say no to the puppies when he's had enough play, but he is never allowed to be mean to them. A growl to tell them I'm done playing is ok, a growl to tell them to get away from my momma, space, blanket, etc... is not. At the same time I don't allow the puppies to continue to bother him if he's told them enough.
Walks. Walks are the best and fastest way to get them to bond as a pack. It was what broke the ice with Boo when Gracie Ruth came and then later Yogi. So do you best to find times and places (if the weathers bad) to walk as a pack.
And last of all, PICTURES! Please post pictures of your cuties when you can.
