Chilling Humbert Humbert

Part 1 of Lolita ends with Humbert telling Lolita that her mother is dead. He buys her some trinkets and they find a hotel. The final sentences are:

At the hotel we had separate rooms but in the middle of the night she came sobbing into mine, and we made it up very gently. You see, she had absolutely nowhere else to go.

HH has manufactured this situation, and his glee is palpable. He is driven by his desire to behave this immorally. But he is a lover who has not killed, unlike other romancers in fiction. The problem of course is that he is no ordinary lover: he is making it with a child. He is abusing her twice: sexually and emotionally. We judge him on each and the one intensifies the other. I wonder at the relationship he had with his mother, to deliver this news so flatly.