I wanted to go with the monthly, but I could not. I don't mind safe words but boundaries? To know for instance the back of her knees are very ticklish yet off limits! Hell no - that ain't workin'!
Since the one is "One time only...no time limits" I am assuming you mean for as long as you can move your fingers. If this is the case, I am definatly going with that one. Thanks too years of having a full time job and full time college classes, I can stay awake for up to six days.