I don't know how someone who is not Harlow's mom will react, but I will tell you that I have watched this five second video about 4000 times. That is no exaggeration. I basically haven't done anything for four straight days except stare at it and press play over and over again on my phone.
Please keep in mind, this video might be cute, but it is not innocent. I'm pretty sure this is Harlow laughing AT her big sister, not with her.
Add this to the list of funny things Harlow does that I want to remember.