Stories of Tie Up Games

I remember reading it years ago, literal years ago growing up. I believe a brother and sister make a bet with a babysitter to tie her up. The parents arrive and she hasnt escaped. They untie her and she points out the bet was if she got out of the ropes then her captors got tied and tickled. Her parents agreed and paid her extra while they were tickled in the other room. Was short and sweet, but it randomly popped into my head when I saw another babysitter story and now Im wondering if its still floating around