Family Problems

My aunt was cheated on by her husband. They got a divorce last month obviously last month was just a few weeks ago and now she's engaged. She has only known the man that she is engaged to for 2 weeks. Her kids just met him two days ago and are now calling him dad! The only people that know are me, my mother, and my grandmother. Her ex husband does not know about the man around her children and neither does my grandpa or my other aunt. She's been known to get into relationships quick so she doesn't have to work. Also she fetishizes white men for some reason it's like she only loves him because he will pay for everything and because he's white. I honestly don't know what the fuck to do because she's fucking crazy.