The Royalty article had quite a few photos--I'll dig through my unorganized stack of info and look for the article.
I 'googled' her and discovered that she did attend the internment of Nicholas II but in the group photo she wasn't in it.

She passed away in 1999.
Nicholas Constantinovich
b. St.Petersburg 14 Feb 1850
d. Tashkent 14 Jan 1918
m.Orenburg, Russia 1882 Nadezhda Drier [Dreyer] (1861-1929)
1) Pr Artemy Iskander (Tashkent 1883-k.in Russian Civil War 1919)
2) Pr Alexander Iskander (Tashkent 15 Nov 1889-Grasse 26 Jan 1957)
m.1st 5 May 1912 (div) Olga Rogovskya (b.1893, disappeared in USSR)
m.2d Paris 11 Oct 1930 Natalia Khanykova (St.Petersburg 30 Dec 1893-Nice 20 Apr 1982)
1i) Pr Cyril Iskander (Tashkent 5 Dec 1914-Moscow 1992)
2i) Pss Natalia Iskander (Tashkent 21 Jan 1917-Moscow 24 Jul 1999); m.Nikolai Dostal
I seem to remember from the article that Natalia's father basically abandoned her mother and escaped to the West and she never saw/heard from him again, though she kept mementoes of him. I can't recall though, whether he was supposed to try to get his family out and just couldn't or didn't bother. As you can see by the date/location of his 2nd marriage his life went on in France. I guess that line is extinct now since Natalia's uncle died without issue, her brother died without issue, she married but had no children and her father apparently had no children by his 2nd marriage.