Finding a trustworthy person to babysit your kid is one of the most important tasks every parent has. And so, quite often they turn to their family members for help.
But not every family member can be trusted with childcare. Like in this story, where a woman left her daughter with her beloved sister-in-law. This babysitter proceeded to forget the baby at the park for two hours! And later, she showed how spiteful she could be when her mistakes were brought up.
More info: Reddit