Let me give facts straight and perhaps you can understand my critic:
-Alexis only remembers the protagonist and wants to have contact again after she hears that he was promoted and started to win a good ammount of money.
-The first scene that you get with Alexis is a date at a high-class restaurant that costs 500$ said dinner and even more she is willing to fuck a stranger in the toilets behing your back.
-In the main dates you have she is interested in random guys rather than the MC and can lie to our face multiple times.
-The conversation you have with her about rape becomes really false if she did cheat you in those dates, especially the "I wouldn't do that to you!" refering to the cheating, it gives a really false meaning when she has cheated 3 times already in 3 different dates with you.
I'm not saying that the concept can't be applied, having Alexis be a slutty woman that likes to have sex with other people, in fact we could say that perhaps it's just a casual relationship at that point.
However if you analyze her actions it's hard to believe her, in fact it feels like she only remembered the MC because she heard you have money and she wanted a bank, not out of feelings or anything else, just pure interest. In fact seeing her actions it's hard to not call doubt when she talks about the "rape", overall I'm not saying that it can't be true but depending on her actions during the dates it feels like she is a really big liar.
You see... I can understand your point, perhaps she is messed up after it and perhaps she feels pleasure now by cheating on her loved one, but the points that contradict it are that she called you after hearing that you got promoted and were earning a good ammount of money and that the first date you have with her is in a high-class restaurant. That's why I can't see it that way.
To tell you the truth I have replayed that route multiple times to find anything that may give me a sense of "she is a good girl", but the more I analyze it overall the less I can believe it, perhaps if the key for her calling you was that she wanted to be friends again and solve the situation, have a bit toned down the relationship itself and more like friends with benefits it would be okay in my book. But it feels she only cared about money and she doesn't care about hurting you at all.
P.D: Overall I believe that doing a few changes the storyline would be okay and it could follow the development it had, calling you after 2 weeks in game without caring about your current money situation and just recovering the friendship, still it would be nice to hear her excuse after you catch her fucking someone behind your back during the date rather than directly leaving.