Well, if you want to get very technical, the reason pedophilia is against the law is not because of the age of the child, but the level of maturity and responsibility involved in sexual engagements being too high for an inexperienced individuals. Chrysalis is well past the arbitrary cut-off age, so there is no risk that she’s at risk of being manipulated or exploited (instead, we ought to beware the opposite way).
But still, societal rules on morality do result in emotional responses you have to factor in when propositioning her for certain kinks. And Chryssie is probably related to every larva in her hive, so it’s hard to make child sex not have an added level of creepy Oedipus complex for her.