Charlotte sent Lolita to baording school before she married Humbert. Charlotte found Humbert's diary professing his love for Lolita and confronted him.
Charlotte is killed in an accident by a car just after the confrontaion.
Humbert retrieves Lolita from school and is met with passionate affection. Humbert finds Lolita many years later and is met with words professing her daughterly affection for him and no passionate lovers feelings. Humbert is intrigued with Lolita because she reminds him of Annabel and he is unable to heal that loss even as an adult. Lolita is young and entering puberty, hormones rushing, she is also without a father and, longs for one more than likely. Humbert is definitely not showing respect by using Lolita, Charlotte by sending Lolita away, and Lolita by using Humbert to get back at her Mom for sending her away and also for not having a Dad.