Did I do the right thing informing my boyfriend about his daughter?

Anonymous

My boyfriend is 33 years old, divorced and his daughter (only child) is 9 years old. We've been dating for 2 years now and the girl is the typical, effectionate daddy's little girl. She bonds better with him than the mother and is a smart kid with elaborated use of vocabulary for her age. We live with our cat Leo whom she adores very much, well that's what I thought.

4 months ago: I caught her trying to give chocolate ice-cream and chocolate cookies to Leo. Apparently she didn't it can be fatal if cats digest large portions of that. She apologized and was only treating to feed her with treats. Ok so far, it's just an innocent mistake. Kid didn't know any better.

Last week:

She got caught with articles on her cell phone about what foods can kill a cat, if chocolate ice-cream is really bad, how much can a cat eat before it gets sick, how to make a cat sick without getting caught, what's it like watching a pet dying, etc. I confiscated her cell and forwarded it to my boyfriend. She ended up crying and claiming it wasn't her that type all that and more excuses. Now the girl hates me for being a snitcher and doesn't want to speak to me.

I mean... I did the right thing in telling him right? Those were awful articles.

Updates
8 mo
My boyfriend has never seen this side in her daughter before. It really hurt him so much seeing all those articles found on her cell phone. So basically what she was trying to do 4 months ago was deliberately.
Did I do the right thing informing my boyfriend about his daughter?
3 Opinion