James would most probably end up cheating on Lily.
I've seen fans who are so sure James would end up cheating and that James and Lily would not have a successful marriage. But this is not fair We never even see James and Lily as a couple for people to assume James and Lily would have a bad marriage in the first place. Yet, there are some people who claim to be sure of the marriage failing. Anyone can turn into a cheater. It's not fair to accuse James for being one when there's nothing to point to him being sexually immoral. The evidence they present for this is not necessarily true in my opinion.
Let me present you with their so called "evidence" that James would most probably cheat:
"Lily is harsh and critical. James is irresponsible, so James would eventually look for kindness somewhere else. James would not stop himself from cheating because he doesn't care about what Lily wants"
I'll argue why I don't think this evidence is necessarily true:
I've already covered James hexing Snape in his 7th year in chapter 2 and 3. First of all, we don't even know if Lily cared about James hexing Snape in his 7th year, or if he knew that she cared. Lily was no longer friends with Snape by then. Second of all, he was 17/18 then. It's not fair to use something he did at 17 as "evidence" of him being a potential cheater. Even their evidence itself doesn't hold water. What the hell does him hexing Snape have to do with his fidelity? If you want to deem James as a potential cheater, at least present proper evidence that involves him having a wondering eye. Just because he does one thing that Lily disapproves off, it doesn't mean he'd stoop to cheating. James hexing Snape behind Lily's back is NOT evidence that he would be sexually immoral. Both are completely unrelated.
As for Lily being harsh and critical, this is made up by Snape fans to justify his actions and free him off blame for the ending of his friendship with Lily. They unfairly shove all the blame on Lily by calling her harsh and critical. They even say that Snape dodged a bullet by not marrying Lily. Yeah right. It's Lily that dodged a bullet by not marrying Snape (unless you count her dying young after marrying James).
And another thing people forget is that wizarding culture if different. The wizarding culture is still stuck in traditional times with traditional values. They haven't even progressed to using pen and pencils for goodness sake. So divorce and infidelity would be quite rear in their culture. James is pureblood, so the only culture he knows is the traditional wizarding culture. In my opinion, this in itself should decrease his chances of engaging in sexual immorality. So it's just not fair to me. Just because he was a bully, it's not fair to accuse him of every sin in the book.
