Hi everyone

. We've finally decided to add to our family and are picking up our new bundle of joy on Friday. It will be quite late when we get back, so plan to wait until Saturday to introduce our new little boy to his new big sister.
Several sites recommend keeping puppy separated from other dogs for a few days and then gradually introduce them to each other. However . . .Isabella is like Velcro . . .i can't even go to the BATHROOM by myself

. So keeping them separate would mean separating myself from Isabella while tending to the puppy.
She's not the least bit aggressive with other dogs . . .in fact, is more likely to tentatively approach a new dog then scamper off if it looks cross eyed at her. Is the separation for several days really necessary?
We'll have an expen set up, so he will only be out and about when closely supervised.
Also, any tips on making certain Isabella understands she's not being replaced would be appreciated.