when she finds out you've been showing her video's and discussing her on a public website.
She already knows. She is cool with it.
We told them at birth that we own them and their internet experience until they're out of the house. We do grab their phones randomly and check their texts and we monitor their social media. They needed to agree to this before we'd let them use phones/social media. There have been no issues.
And yes, they might have sneaky ways to do things we wouldn't approve of.