Like father, like daughter!
The businesswoman is being sued by Aquazurra for copying their "Wild Thing" tasseled sandal down to even minor details. However, it should be noted that fashion designs are not protected by copyright law, which makes it easy for knockoffs to go without being challenged in the marketplace.
That's probably why Ivanka & Co. weren't too worried when they totally copied the Aquazurra shoe!
Note the similarities between Ivanka's "Hettie" sandal on the left and the "Wild Thing" shoe on the right (below):