Hi I had a yorkie many many years ago that followed me for ten years. I could not break her of it. and it drove me nuts. I hope somebody on here as some ideas for you.
Seems like your little girl is always feeling insecure and stressed cause she feels she needs to make sure you are not with the other one maybe. What a life for her and you.
And your other little one is not having fun either.
I have no answers but just want to let you know you are not alone.I am sure somebody on here has similar issues and can offer a solution.