MJ says she stuck with Paul for the kids. Hence, when she told Peter she wasn't leaving, it was for the kids. Not for Paul, that's why she admits that she and Paul "didn't work without an apocalypse". When she breaks up w/ Paul, she told him it hadn't worked for a long time
Of course Reddit left out the most important page. 🙄
These excuses have never worked for me, and canonizing them doesn’t change anything. Yes, it says her relationship with Paul wasn’t good…but she still chose that over Peter. It also once again degrades her.