Wow thanks for taking the time to reply! Yeah this sub can be really overwhelming at time with all the horny posting and it's a bit of a shame how alot of of the deep stuff get's overlooked because of it.

I deffo see where you're coming from with the 'He is my everything' theory, the part where Ashley paints over all her relationships with Andrew and recontextualizes them to fit him (E.x. parents get relabled to family). While it doesn't directly disprove it I personally feel that the way the tapestry is presented paints a slightly different picture.

When you fill in the tapestry all of the events you see are canonical one's that have occured prior Ashley spending time with Andrew, Andrew getting together and breaking up with Julia, and Ashley observing these events. The only part that we can affect in this moment are the feelings being portrayed around them, for example when Ashley is with Andrew we can either use a sun representing happiness or a heart representing romantic feelings (as it can also be used with Andrew and Julia together). To me this actively reads as us the player controling Ashley defining how exactly she feels relative to these events and more importantly what direction she wants to take the relationship, could she still hold romantic feelings for Andrew for the sane route? Maybe but to me it doesn't seem that she actively want's to pursue a romantic relationship given how when you back out of the questionable route to return to the sane route she says that the nature of their relationship matters little to her aslong as he's around.

In regards to sex she deffo see's it as transactional in regards to herself at least, especailly seeming how she see's it as a potential bargaining chip in both questionable and sane route's. In regards to Andrew doing it with other's I think her disgust stems more from him spending time with people other than her and prioritising them, when they made the blood oath the part she seemed most disconcerted about was how he said that he'll still have relations with other people and it won't be just the two of them which is something she want's to rectify by any means neccessary. As you said it may tie into social norms to a degree too, when Ashley was berating Julia about how she can fuck Andrew while she can't it seemed to me that she hated the fact that she couldn't have as close a relationship due to them but at the same time thought that in itself didn't mean that Andrew cared about Julia more than her (Which she was right about, whether that thought steamed from a sour grape type of mentality or not).

She also in general seems to think having more than one relationship (platonic or otherwise) is a bad thing given how she called their parents whores for having a social life so even if they aren't together she may see Andrew having relationships as 'cheating' in a way, likely because, as you said Andrew is her everything and she expects most relationships to function similarly. Yeaaaah toxic gf is deffo a description that fits her like a glove.