Valentina's concerns throughout the day weren't sexual in nature. It was an anxiety that came out of fear of having Dahlia stolen away and it was far more emotionally driven than physically. However, as the girl teased, taunted, and seduced, it was only natural for the vampiress to begin to get overwhelmed by her own heat.
Ever since their first time, the two had made a habit of being together everyday and although it still hadn't been enough to fully satisfy the Archduchess, it wasn't as though either felt discontent. But now under the current circumstances… having been tempted far too much already paired with the request to just give in to all her obsessions, it was just too much.