I always had the feeling that Madde was the kid she was closest to. So Madde now is gone. She surely is not happy with CP's choice of partner. I never had the impression she was close to Viccan at all.
It's normal that Silvia and Victoria have problems in their relationship. Vic is the first child (parents often do not know how to react, have no experience with raising children), and she is also a future monarch and CP - her upbringing, manners, behavior... Vic was expected to be "perfect". Vic grew up under the spotlight, had dyslexia, eating disorders... and of course, she was under enourmous pressure. My guess is that her mother didn't know better and how to help Vic.
With Madde things went easier. Silvia already had experience, and of course, expectations of Madde were not as with Vic. Madde could grow up as a family favorite and now afford more privacy for herself and her family.