Also, to reiterate Guyver's point below, maybe you should consider having multiple separate scenarios for each girl in a gameover if you're not satisfied with how a peril with all three is portrayed.
I'm not saying that every gameover should consist of divided scenes but sometimes a situation might call for more focus on each girl individually. While the regular spider girls would be happy to keep the trio webbed up all together in a larder or something for easy mana refills, I'd imagine that Little Webby would love to have some alone time with Mira while Selena and Hemmy have fun with the other spider girls. Maybe even Webby's sisters to spice things up for a boss gameover :)
(Are Webby's sisters and mom apart of the story in the cave? I'm assuming that the situation will be made clear once you get to finishing up the area but I'm curious what Webby's home situation is like since Dinner Party Guest is on hiatus and since you have the game to worry about it isn't likely to update anytime soon.)