Princess Aila had lost control of her senses.
The only thing she could think of was to take all of William's memories that belonged to the black-haired beauty that the Half-Elf wanted to entrust to him.
After absorbing William's first memory, the angelic beauty was bathed in warmth, love, and happiness that she hadn't felt in her current lifetime. It was so sweet, and so intoxicating that she couldn't stop herself from wanting more.
With every memory she took from him, her addiction grew.
With every kiss, she felt herself falling helplessly in love with him.
It was as if his memories of Belle were affecting her emotions, making her feel that the feelings of love were being directed to her, instead of the beautiful wife that William had left back on Earth.