Her hugging or kissing her father on the cheek is incest?
I grew up in a household so rigid and cold, you can make a case for my parents being sociopaths, and I'm not seeing anything that could be remotely identified as inappropriate in those photos.
Granted, he's said some rather questionable things, but even those are not proof of anything he's actually done, nor has there been any indication of such coming from Ivanka.