Is it okay to be blunt with an autistic person? [I Know Someone With Autism]

I have a cousin who is autistic and she refuses to see reality and only wants to see the good sides of life. I mean it’s great, but she needs to hear the negative parts of life as well. She hates hearing the negative part of herself when she screws up or when she’s lying or whatever and she needs to fix it. When she asked us for an honest answer or an opinion we gave it to her straight, but very sincere and tactful, but she gets upset. Well she shouldn’t of asked. I don’t care if she’s autistic, I’m going to be blunt with her for her to see the bigger picture. She asked the same questions over and over and over again which is very annoying. Show respect people‘s boundaries but sometime she pushes it. Several people have told her not to hug because of COVID-19 that’s been happening. She has to be reminded because she doesn’t always listen sometimes we have to y’all. Frankly we have to be blunt with her, but not rude. I’m learning about autism and I’ve been learning about it for about a year or two.