Draco and Harry were perfectly fine not speaking to each other for decades. Really. However, it turns out having your sons get married is a great way to interrupt your sworn hatred.

Albus Severus Potter and Scorpius Malfoy fall out of love the same way their fathers do. Which is to say, they don't. It's been a long time since Harry Potter and Draco Malfoy broke up and moved on, but of course, their sons had to go and fall in love. Draco has something to say about that, Harry is worried, and McGonagall has never been more ready for retirement.