About the Cindy situation and all the discourse around it, I think there are several different questions to be asked.
Was Cindy justified?
Will Cindy cheat on Ian?
Would a man of sound mind pursue a relationship in real life with someone that is a real life equivalent of Cindy?
My answers are as follows:
1. Cindy was not justified. Yes Wade absolutely neglected her and her wants and needs, which is grounds for breaking up. BUT not for cheating. Imo the only justification for cheating is in cases of physical abuse or in cases of extreme mental abuse. Victims in these situations often can't leave the relantionship and cheating can therefore be justified. Neglect can also be a form of abuse, but I don't think Wade's neglect rises to the standard of extreme abuse. All of this is obviously contigent on our understanding of their relationship and we don't know if things are different between them behind closed doors as we only see Ian's and Lena's perspectives, not Cindy's or Wade's.
2. I think Cindy has the highest chance of cheating on Ian out of the main cast, besides Lena of course. This is because we have seen her already cheat so it could definetly happen again. If this were to happen I could see two reasons for this happening. The first would be because Ian falls into the same traps as Wade and somehow neglects Cindy, maybe the player can make Ian cheat on Cindy even. The second way it might happen is if Ian becomes too pushy or protective over Cindy's modelling. We can already see Ian lose relantionship points if Ian tells Axel hands off when he touches Cindy's face, but not when he touches her leg. Clearly there is a theshold for what Cindy will accept from Axel and the industry in general and that theshold might not be the same as Ian's. All of this being said, its not inevitable that Cindy will cheat on Ian on the romantic route. Eva Kiss wouldnt subject her followers to NTR/getting cheated on content withhout warning or foreshadowing. It would be the most unpopular decision if she did force the Cindy route to turn into an Ian getting cheated on route without a cheating free alternative route. IMO its already kind of a bummer that we can't make Cindy agree to break up without sleeping with her atleast once.
3. If this were real life no man who doesn't want to be cheated on would pursue Cindy after knowing she cheated. Yes she cheated under specific circumstances with a close friend after her boyfriend had neglected her for presumably months, BUT still she demonstrated the capacity to cheat and more importantly the ability to justify cheating. Even if a relantionship with her would be different, nothings is to say she wouldnt find a new frustration with her new boyfriend and cheat again. That might be an extreme philosophy to some, but personally that is the most obvious thing to me. why would anyone ever want to date someone they know has cheated on someone in the past.