Personally I don't think you're wrong for not wanting to watch the kid but at the same time you are wrong for leaving the kid unattended it's not the child's fault that their mom sucks ass I at least would have told her that if she didn't take her kid with her that I would be calling the authorities or something I mean it's still pretty f***** up either way but leaving a kid like that by himself unattended and specially so young no
They're both assholes, bc the sister shouldn't drop her kid like that what if her sister had important plans or something? And then op is an asshole for letting the kid unattended
