I can't find my all time favourite story

I used to come on here and read a 3 part series about a step sister who helped her step brother become flexible enough to self suck his cock. In the process she turned him into a sissy. I read it lots but now cant find it. I thought I used to search for Self sucking sissy. But I cant find it now. Can you help?

Probably the author deleted their account. Their stories die with them.

Do you recall the authors name?