I read the article....I don't know if my answer will satisfy you but it's hard to answer this question. 1. I think that not every person is ment for us. 2. sex is not everything 3. very often when we get married we don't know ourselves. That's why many people have second wives. Pawlikowska used to say that first marriage is a mistake, second is good but the third one is great.
That woman's marriage was based probably on sex, they married young and that's all what she new: husband and kids. Then she started talking with someone that opened her eyes on many different aspects of life. It's hard to say if it's love or it's just lust for something different, intellectually deeper. The only problem that we idealize people we don't know, but if we get to know them and we still are attracted by them, it can be real love.
I've noticed that people of passion don't need traditional wives, dinners every day, they need a lot of freedom to develop their passion, trust and open minded wives that have their passions because such women understand others' passions.
Examples: Kulczyk, Czarnecki (his first wife wanted to keep him for herself that's why they divorced), Frida Kahlo (she was sick, she drunk, smoked, cursed and Diego loved her) and many others.
I really recommend you that movie "Diary", just watch it during Christmas.
And the last thing: we don't know how to explain Love.
Uff, why are you asking me these difficult questions, if you don't want to have a baby with me, he, he, he......;-)