I see, I had added a bit of a buildup a few mins ago with the girlfriend mentioning how she seems to loose a bit of what she gained during growth, you getting some growth from her in certain scenes and rex also growing off of her and such, so, she kind of is a kind of a huge well of growth, who has a certain amount of almost subconcious control over her growth and its transmission, it also makes her a lot more impulsive the bigger she gets, the idea was that because of the events that happened beforehand she kind of just let you subconsiously suck it all out, you have been asserting control over her, but your body doesnt have the capacity (yet) to hold all of it, things like the training programme and the research were so you can artificially atune yourself to the growth but it doesnt match hers and so you cant keep it, its definitely a bit obscure, I focused more on the "sexyness" of the scene rather than a fully logical sysem there specially because dom route is more built onto the normal one, its meant to be an alternative route but ill add this to the list of issues and think something up.
Thank you for the feedback.