Well, this was an actual mindfuck. One he was not pleased at being trapped within. There was absolutely no way this wasn't some sort of mind trickery, or illusion magic, but when Thor said words only his brother could know, it gave Loki pause.
He had just been in space. He had just watched his home, the place he had ruined his own life over, fought over, break into tiny pieces during Ragnarok, and now he was here. It just didn't make sense. And coupled with the idea of different universes, varieties of himself, and apparently his brother had kids. Why didn't he have kids? That seemed rather unfair. And Frigga being alive... that, now that seemed untrue. Something he couldn't simply swallow.
But instead of pulling his usual tricks, he stayed put, in the god awful outfit left for him, for Thor to appear. And appear he did, claustrophobic hug and all, as Loki tried to push him away...
"This is completely unnecessary, Thor," he complained. "We've just seen each other..." The truth resonated through him, knowing what he had experienced to be reality, but this was something different.
"That is a loaded question: Are you well? You're trying to convince me that Frigga is alive, and you have children. You must realize how asinine your truth sounds right now," he said, his voice mildly combative.