how to get a girl to do some "naughty stuff"?

[Jim]

pleae dont judge me for this.About a year ago me and my cousin were doing some naughty things. we would get naked or partly naked and would streak around,touch eachother and do naughty dares and stuff.then one day we really did alot,we got completly naked at her house and we masturbated, touched eachother and stuff like that.it was so amazing.and its alot easier to dothis stuff with her because we know eachother and dont have to worry.Latley she wouldnt do this stuff and I have been wanting to so bad.we still kinda talk about naughty stuff sometimes but she just wont do it.I kinda think she wants to but its hard to tell.What i want to know is ways to get her to do this stuff again.ive heard about reverse pshycology and i am going to start trying that.Anything you know will help.What should i say to get her to do this stuff again(seduce her)I really miss doing this stuff. By the way:i am 14 and she is almost 16