Somebody raised this question in another thread.
To my knowledge, there is no such scene yet, but if I were making book on it, this lady would be my betting favorite:
She has two things going for her: (1) family nudity legacy and sibling rivalry; (2) she may be the oldest female celebrity born in this millennium (January 8, 2000), so she’s had the most time past her 18th birthday to ease into it.