Lgbg, I will buy your newphew a pack of clips.
Seriously, you raised a valid point in your story about the restaurant. If we insist our women should dress like nuns, then where do you think our men will focus their attention? On the non-Jews.
In fact, dressing attractively is a requirement for Jewish women, as long as it is tzniusdig. The gemara says a father must buy his daughter things that will make the men “jump” on her, meaning want to marry her on the spot.
In addition, there is a halacha in Shulchan Oruch that a wife who doesn’t use the standard makeup and perfumes of the times can be divorced without a kesuvah.
Let us not Talibanize the women in the guise of non-existent halachos. Keep tznius, but at the same time, dress attractively.