Adding important choices after publication

I have 4 chapters of my story published so far and have decided now that I want the reader to be able to choose their sexuality.

If I let all new readers choose their sexuality, will this cause errors for current readers since I’ll be using “if elif” throughout my story?
Or will their story automatically go with the first option, so if my first “if” is the straight version they will continue experiencing that version?

I would add this option in episode 1 and 5 so each reader will have a chance to choose their gender.

That was my first idea but then there might be readers who are on like chapter 3 :confused: I guess I could ask at the beginning of all chapters

Add in episode 4 because if you add this the reader will have to re read the episode 4 anyway and yes if you want you can add this to every chapter.