Unprompted screenshots and Siri activation on iPhone

Second time yesterday I was texting my daughter and a screenshot goes on picture on the text. Yes she does go inside my phone. She has access to a lot, but I keep changing everything and now I’m I’m texting her and it happened again. I have not touched the phone the phone was laying on the table and Siri talks for me. My text why did my phone go off?

[Re-Titled by Moderator]

Original Title: I don’t share unless I need to send them something that I saw, but I don’t send them pictures. Why did my phone snapshot just like that? I’m the same girl same person a screenshot without me touching the phone that normal no.