Breasts Too Spaced Apart After Augmentation and Lift

Your implants will most likely drop if they are smooth walled.  However, they will not get closer together. Your cleavage is your cleavage and it is very difficult to narrow that region.

The space between the breasts is defined by your anatomy. During breast augmentation the tissue is dissected to that boarder. So if there is significant space between them, and since the breast size isn't that large you'll have to find a bra that creates the cleavage.
Few women have breasts that will have cleavage, without a bra, after augmentation. So see your Nordstrom's lingerie department and get fitted.