Well, it kicked in here in the UK this morning, so I had to update Norton to include a VPN just to get here. 

 "Sections 104, 106, and 107 criminalize the possession and publication of specific extreme pornographic images, including realistic or AI-generated content depicting strangulation, suffocation, or illicit sexual activity involving or pretending to involve family members or under-16s."

Note where it says 'pretending' - this includes calling them step-parents, step-daughter, etc.