Love can be the most dangerous emotion of them all. It drives people to do all kinds of things, bad and good. Istredd and Yennefer made their bond before they were in love and they did it the official Brotherhood way. Theirs was always stronger than most because of their emotional binds, but it's still always been appropriate. But Yennefer is better at her boundaries.

"I'm worried if we wait, we'll find reasons not to do it."

When they're in their right minds, they'll have all kinds of rationality about why they were not at their best and they're fine. They can go back to before the mountains, like Lucifer said, that's what they'll say. He rests their foreheads against each other.

"So. We'll have to agree that when we're both stable, we won't brush it off. If we keep going in this direction, we won't be able to block the other anymore. We'll be bleeding into each other."

They'll be two minds blending into one rather than individuals. Istredd was never warned about this because Stregobor wasn't capable of loving anyone enough to let them get this close. They were of course all told to be careful, but this was more of an accident than an active choice. They need to be able to still block each other. Like Istredd when he's with Yennefer or dealing with something on his end, or when Lucifer wants his quiet or to talk to others separately. They need the option.

"You have to hold me accountable, Lucifer."