Chrysalis knew for a fact that Ap bit you, despite her apparent claim that she had accepted your lie. Not that it was the most complicated lie in the world, but it meant that she really couldn't blame Vespa, whose bite wasn't as bad damage wise Ap's, without casting blame on the cocooned guard as well. Maybe you were overthinking things, but if you leaned too much into it, Chrysalis might recognize your bias toward Ap, which would lead to some other issues.