I think they will bond first and soon the new addition will start to want to bond with you. Just remember...... as puppies, they like the familiarity of another little Yorkie. Give it time.
I look at some of the pics when Seymour was little and on every pic Shelby was looking at the camera and Seymour was looking at Shelby.
Now Seymour is the first one to get on my lap in the evening..... & Shelby prefers her bed in front of the fireplace!!