I would have a sudden attack of swooning feminine weakness.
Ordinarily his sister would have fainted rather than admit any feminine weakness.
The Jungian term for this is "anima," and it is suppressed as the unacceptable feminine weakness of the outwardly strong male.
She stripped to nothing and scrubbed every inch of herself with the herbal soap that was one of her few feminine weaknesses.
Tacitus described her as "determined and rather excitable" - "Agrippina knew no feminine weaknesses.
Anything that betrayed a feminine weakness.
You are letting your feminine weakness for gold cloud your wits, Peabody.
She knew there were tears on her face and was willing for once in her life to use this feminine weakness to gain her end.
In a moment of purely illogical, utterly feminine weakness, she compared her body to the graceful form on the divan, and snatched up her shirt.
A moment of feminine weakness, perhaps?