The name of this thread says Princess Marianne, but your new plant proposal said Princess Marianna. Are you sure of the name? There are three photos of Princess Marianna on HMF, but one of them doesn't seem to match the description at all. Your photos also don't match the description ("light pink, ages to white"). Does it have an apple scent? The buds in your photos are much darker than the buds in the HMF photos.
http://www.helpmefind.com/gard...
I thought yours might be Queen Margrethe, the parent rose, which has blooms of a deeper pink, but its buds are never as dark as the ones in your photo.