Well, you found the 3 branches, something I didn't know about. I did propose that theory, but I was saying that I hope you're right after you said, "it seems entirely possible that one of the branches is a result of the bonus storyline".
So really, what I'm saying, is that I hope your evidence of the branches proves to be right with regards to this theory.
She could discuss it with Sophia, and I suppose that's one way to go about it, but I personally hope that Sophia is mor eof an eyes-on witness to it, much she like how she witnessed Ellie and Juila kiss. Maybe Sophia will also get a little turned on and plays with herself while watching them because that will really advance their relationship as she might feel a temptation to do things like that with Ellie later.