That’s the one. A lot of people disagree with me on this because Nick wasn’t being held down and screaming no. Those people have an incomplete understanding of consent.
Nick did not consent to sleep with Adalind, and at that point in his life he would not have. He consented to sleep with Juliette.
And any time you consent to one thing sexually and are subjected to another without your consent, that is rape. Any time your ability to make a fully autonomous decision about having sex is compromised and someone takes advantage of that, it is rape.
In the real world, this could look like someone going farther than you agreed to without asking, or coercing you into sex while you’re drunk or high, or putting something in your drink to make you compliant, or slipping off the condom during sex (yeah, people have done that).
In a magical fictional world, this also includes any instance where magic is used to get a yes or override a no, or where magic interferes with a person’s ability to decide…be it love potions, shape shifting, twinning spells, or anything else.
In Adalind’s specific case, that brings the count of men she’s raped on screen to three: Hank while he was under the influence of her love potion cookies, Renard while he was dealing with her obsession spell, and Nick while she was disguised as Juliette using the twinning spell.