Ah, that gives me an idea of what you’re looking for. Chapter 25 has a F/F/TF scene (top transformation, not bottom). Chapter 27 has a M/TF. There are a few more chapters around those two points that I probably didn’t tag properly but they are usually F/TF and M/TF scenes.
As a note, chapters 34-36 have explicitly called out trigger warnings.
If you want to see all of the ASSM codes for the chapters, you can look at https://tsade.com/nine-sisters/deriks-luck/ which has chapter summaries and codes. There is a lot of scenes (it is over 180k words) but I didn’t tag them as well as I could have since I’ve gotten a lot more extensive with my tagging in the last decade. :) For example, the “cd” is absent when it shouldn’t be.