Unrelated but does anyone know if the partner sharing photos in Google Photos costs double the storage? I know I can view my partners photos in the app but ther

Unrelated but does anyone know if the partner sharing photos in Google Photos costs double the storage? I know I can view my partners photos in the app but there is a "save" feature which allows me to save my partners photos to my own "galley". Does that mean the photo counts towards my Google One storage twice? I think it doesn't but I'm not sure.