AITA for telling my sister she is too heavy and lazy to watch my kid

She’s fat, it seems like she’s actually obese from your post. Which means in case of an emergency it would be impossible for her to run after your daughter. Now, every lid is different. But if a kid has a tendency to run off sudd (and many do), you’ve got to be on alert and ready to go after them. A friend of mine has a daughter the same age as yours and hers was riding a bike and suddenly went off in front of a car. Now my friend ran behind her and luckily the kid was not hit, the driver was also quick to react. Shit like that can happen in an instant.

NTA. A leash is abuse imo, it’s a house not an airport (which I could **maybe understand). Don’t leave your kid there any more.

/r/AmItheAsshole Thread