found nudes on my little sisters phone

so i was going through my 11 year olds sisters phone and i found pictures of her boobs on her recently deleted. she said she didn’t send them to anyone but i don’t know. i’m really disappointed in her that she was taking them. how should i handle this.

update: she said she wasn’t taking them for anyone that they were just for her she was checking her breast because our aunt died from breast cancer and i had a scare in 7th grade and she was afraid she was getting it so she wanted to check herself