This mod is great and works almost perfectly.
I think there's room for improvement, though.
First of all, I think there should be a health threshold (say player's health <20%), before being hit by a chaurus' spit could trigger the tentacle attack.
It just seems to me too much lore- and game-unfriendly, if each poison spit causes impregnation.
If character's health is above the threshold, the poison spit should work as intended in vanilla game.