Look. your W is in the throes of romantic love. It's distortive overwhelming perfectly natural and fortunately for you, short lived. Her memories of you will be selective and distorted; you must stand firm.
Do not give her ultimatums. they will drive her away. Instead be stable, cool, and apprpriately attentive to her emotional needs. When she wakes up, she'll see you as someone who held it together while she was pulling apart. That's very attractive!