>She is colourblind and can't see the colour green, so sometimes when she really pisses me off, I pull up a picture of a cauliflower or a broccoli on my phone and make her guess what it is. If she answers incorrectly, then I would lock her in her bedroom until I'm done babysitting for the night.

The fuck is wrong with you

Who would've thought you'd suffer consequences for being an insufferable prick to an 8 year old.

The worst thing about this is, you don't sound remorseful at all. You've been told off and it stings that you're being shunned by your family but there's not a single strand of remorse in your post.