How to view private account story in instagram without following?

Oh my gosh, I saw that post! My child is on Instagram, and this is exactly what I’m afraid of! They’re always on there!

Is there ANY way for someone to see my kid’s stories without them knowing? Like, ANY? Third-party websites… are those dangerous? Do they steal your information? Oh, I’m so worried!

Should I just… delete their Instagram? But then they’ll be upset. But safety first, right? Right?! I just want them to be safe! This is terrifying. Please tell me there’s a simple, easy solution, something I can do right now to protect them!