Enlightened Self-Interest: Gabriel had agreed to Adrien's request to letting his classmates be allowed early access to free maternity wear in exchange that they tell everyone where they got it.
Alya: Guerrilla marketing. Word of mouth. I get it. And maybe he was hoping I'd do a post about it on my blog. Adrien: It's entirely possible. Alya: I'm not letting the fact that I'm getting stuff for free affect what I say, though. I don't do sponsors. Adrien: He didn't say anything about that. Alya: Good.
Obvious Pregnancy: Since she's having twins, Alix is the first to develop a baby bump. When this gives her grief fitting into her clothes, this inspires Adrien to invite his classmates to go shopping for maternity wear.
A Shared Suffering: Nathaniel reasons that the reason why Alix takes out her aggression on him is because she's struggling to find a better way to cope with what happened to her (not to mention all the drama and medical horror that come naturally to pregnancy and birth) and Nathaniel lets her out of a sense of responsibility for her wellbeing.
That's Gotta Hurt: Adrien has this reaction when he finds out that women could tear giving birth.
