No. Of course not. But you're right, it is going to garner a serious discussion if it really is because she is merely "too tired".

I altered a scene, even desisted, when safeworded. But realize when she used it she was as surprised as I was. Nor was it preceded by any claim of tiredness or reluctance. She was overcome by an unrelated emotional conflict and couldn't put herself in the right frame of mind. But THAT is what a safeword is for imo. The unexpected. Not because she wasn't in the mood.

Yes. It's a subtle distinction I'm making, but a relavent distinction.