Monster Jon going into heat for the first time and it being a surprise. It doesn’t know what’s going on, just that it needs something, and it’s not quite sure what. Rolling around trying to get comfortable whimpering as it feels worse and worse. Not being able to articulate what’s wrong when it’s head is swimming so much. Maybe it gets a little more bitey than normal, it’s grumpy it feels bad and Jonah isn’t fixing it.
It should pin Jonah, reigniting that original terror that it wants to eat him, and that fear it quite tasty but not what it wants. Jonah bracing to feel teeth in his throat, not the extra arms that aren’t currently keeping him pinned tugging at his clothes. Jon whining as it’s brain is too addled to communicate as it starts humping against Jonah desperately and finally puzzle pieces slot into place.